The Complete Crypto Glossary
Every cryptocurrency and blockchain term explained simply. No experience needed.
100+ terms
Crypto Basics
Cryptocurrency
Digital money that lives on computers all around the world instead of in a bank. Nobody owns it or controls it, kind of like how nobody owns the internet. You can send it to anyone, anywhere, at any time without needing a middleman like a bank or payment company to approve the transaction. The most well known cryptocurrencies are Bitcoin and Ethereum, but there are thousands of others.
Bitcoin (BTC)
The very first cryptocurrency, created in 2009 by a mystery person (or group) called Satoshi Nakamoto. Think of it as digital gold. There will only ever be 21 million bitcoins in existence, which makes it scarce and valuable. People buy it as a long term investment, as a way to send money across borders, or simply because they believe in the idea of money that no government controls.
Ethereum (ETH)
The second biggest cryptocurrency by market value, but it is more than just money. Ethereum is like a giant computer that anyone in the world can build and run programs on. Those programs are called smart contracts, and they power everything from decentralized apps to NFTs to entire financial systems that run without banks.
Altcoin
Any cryptocurrency that is NOT Bitcoin. The word "alt" is short for "alternative." So Ethereum, Solana, Cardano, XRP, and the thousands of other coins out there are all considered altcoins. Some altcoins solve real problems and have huge communities behind them. Others are basically experiments or hype projects that may not last.
Stablecoin
A cryptocurrency designed to always be worth about $1 (or another fixed amount). Think of it like a digital dollar. Well known examples include USDT, USDC, and MNEE. People use stablecoins when they want the speed and global reach of crypto without the wild price swings. They're also becoming popular for real world payments, especially for merchants who want to skip traditional card processing fees.
Blockchain
A special kind of digital notebook that keeps a permanent record of every transaction ever made. Once something is written in it, it can never be erased or changed. Thousands of computers around the world all hold an identical copy of this notebook, so nobody can cheat the system. That is what makes it so powerful. There is no single point of failure and no single person in charge.
Block
Think of a block as a single page in the blockchain notebook. Each page holds a batch of transactions. When the page is full, it gets sealed permanently and a new page starts. Each page is mathematically linked to the one before it, and that chain of linked pages is where the name block-chain comes from.
Token
A digital item that is built on top of an existing blockchain. If the blockchain is a highway, tokens are the cars driving on it. Some tokens act as money, some represent digital art or collectibles, and some give you voting power in a project. A single blockchain like Ethereum can host thousands of different tokens.
Coin vs. Token
A coin has its own blockchain (like Bitcoin or Ethereum). A token lives on someone else's blockchain, kind of like how an app runs on your phone's operating system. The phone is the blockchain, and the app is the token. People use the words interchangeably, but technically they mean different things.
Fiat
Regular government issued money like dollars, euros, yen, and pounds. The word "fiat" is Latin and basically means "because the government says so." In the crypto world, people use this term to distinguish traditional money from cryptocurrency. When someone says "fiat on-ramp," they mean a way to convert your regular money into crypto.
Satoshi (sats)
The tiniest piece of a Bitcoin. One Bitcoin equals 100,000,000 satoshis. It is like how one dollar equals 100 cents, except way more divisible. Named after Bitcoin's mysterious creator, Satoshi Nakamoto. You will often hear people say "stacking sats" which just means buying small amounts of Bitcoin over time.
Gwei
A tiny unit used for measuring fees on Ethereum. When you pay a transaction fee on Ethereum, it is measured in gwei. Think of gwei like cents are to dollars. One ETH equals one billion gwei. If someone tells you "gas is 30 gwei right now," they are telling you how expensive it is to use the Ethereum network at that moment.
Peer-to-Peer (P2P)
Sending something directly from one person to another with no middleman involved. Like handing a note to your friend instead of passing it through the teacher first. Cryptocurrency was built to let people send money P2P, meaning you do not need a bank, a payment processor, or anyone else sitting in between you and the person you are paying.
Decentralization
When no single person, company, or government is in charge. Instead, power and control are spread across thousands of computers and participants around the world. If one computer goes down, the network keeps running just fine. It is more like a spider web (cut one thread, it still holds) than a chain (break one link, the whole thing falls apart).
Consensus Mechanism
The set of rules that all the computers in a blockchain network agree to follow in order to decide which transactions are real and which are fake. Without a boss or a bank to make that call, the network needs a fair system everyone trusts. It is like the whole class voting on something before it counts. The two most popular types are Proof of Work and Proof of Stake.
Proof of Work (PoW)
A consensus method where computers race to solve extremely hard math puzzles. The first computer to crack the puzzle earns the right to add the next block of transactions and gets rewarded with new coins. Bitcoin uses Proof of Work. The downside is that it uses a massive amount of electricity, which has sparked a big debate about its environmental impact.
Proof of Stake (PoS)
A much greener alternative to Proof of Work. Instead of racing to solve puzzles, people "stake" (lock up) their own coins as a promise to play by the rules. The more coins you stake, the more likely you are to be picked to verify the next batch of transactions and earn a reward. Ethereum switched to Proof of Stake in 2022, cutting its energy use by over 99%.
Mining
Using powerful computers to solve the math puzzles that verify transactions and add new blocks to a Proof of Work blockchain. Miners get rewarded with brand new coins for their effort. Think of it like a digital treasure hunt where the treasure is freshly minted cryptocurrency. In the early days of Bitcoin, you could mine with a regular laptop. These days it takes specialized hardware and a lot of electricity.
Halving
A scheduled event that happens roughly every four years for Bitcoin where the reward miners receive gets cut in half. This makes new bitcoins harder to earn and increasingly scarce over time. It is like a gold mine that produces less and less gold each year. Historically, halvings have been followed by significant price increases because the supply of new coins shrinks while demand stays the same or grows.
Gas / Gas Fees
The fee you pay to use a blockchain like Ethereum. Every action on the network, whether you are sending coins, swapping tokens, or minting an NFT, costs a small amount of "gas." When lots of people are trying to use the network at the same time, gas prices shoot up. Think of it like surge pricing on a ride share app. You can wait for a quieter time to pay less.
Burn
Permanently destroying tokens by sending them to a wallet address that nobody can ever access. Once they are burned, they are gone forever. This reduces the total supply and can make the remaining tokens more valuable over time. Think of it like shredding extra copies of a rare trading card so the ones left become even rarer.
Confirmed / Unconfirmed Transaction
Unconfirmed means your transaction has been sent out to the network but has not been verified and added to a block yet. Confirmed means it has been included in a block and is now part of the permanent record. The more confirmations a transaction gets, the more certain you can be that it will not be reversed. Most wallets and exchanges wait for a few confirmations before considering a transaction final.
Wallets
Wallet
A tool, usually an app or physical device, that stores your crypto passwords (called keys) and lets you send and receive cryptocurrency. Here is the thing that trips people up: your wallet does not actually hold your coins. The coins live on the blockchain. What the wallet holds are the keys that prove the coins belong to you. Lose the keys, lose the coins.
Public Key / Wallet Address
Your crypto "email address." You can share it freely with anyone so they can send you crypto. It looks like a long string of random letters and numbers. It is completely safe to share because nobody can steal your funds just by knowing your public key. Think of it like your bank account number for receiving deposits, except it does not reveal your name or personal information.
Self-Custody
When YOU hold your own private keys instead of trusting a company or an exchange to hold them for you. There is a famous saying in crypto: "not your keys, not your coins." Self custodial wallets like RockWallet put you in full control of your assets. Nobody can freeze your funds, block your transactions, or lock you out of your own money.
Custodial Wallet
A wallet where a company holds your private keys on your behalf. It is easier and more familiar because it works like a regular bank account. But you are trusting that company not to lose your money, get hacked, or go bankrupt. When exchanges like FTX collapsed, people with custodial wallets lost billions because they did not control their own keys.
Non-Custodial Wallet
Another way of saying self custody. YOU hold the keys to your own wallet. You are the boss of your own money, but you also carry the responsibility to keep it safe. There is no customer support line to call if you lose your seed phrase. With that responsibility comes freedom that no bank account can offer.
Hot Wallet
A wallet that is connected to the internet, like an app on your phone or a browser extension on your computer. Hot wallets are super convenient for everyday transactions and quick trades. The tradeoff is that because they are online, they are slightly more vulnerable to hackers compared to wallets that stay offline. Most people use hot wallets for day to day spending and keep larger holdings in cold storage.
Cold Wallet / Cold Storage
A wallet that is NOT connected to the internet. It could be a special USB like device (called a hardware wallet) or even a piece of paper with your keys written on it. Because it is offline, hackers cannot reach it remotely. Cold storage is considered the safest way to hold large amounts of crypto for the long term. The tradeoff is that it is less convenient when you need to make a quick transaction.
Hardware Wallet
A physical device, usually about the size of a USB thumb drive, that stores your private keys completely offline. Popular brands include Ledger and Trezor. It is like keeping your most valuable stuff in a home safe instead of carrying it around in your pocket. You plug it into your computer only when you need to sign a transaction, and the rest of the time it stays safely disconnected.
Security
Private Key
Your crypto master password. This is the single most important piece of information in all of crypto. Whoever has your private key can spend all of your crypto, and there is absolutely no way to get it back. Never share it with anyone, ever. Do not type it into a website, do not send it in a message, do not store it in your notes app. If you lose it, your crypto is gone forever. If someone steals it, same thing.
Seed Phrase (Recovery Phrase)
A list of 12 or 24 random words that can completely rebuild your wallet if your phone breaks, gets stolen, or you switch to a new device. It is essentially your private key translated into human readable form so you can write it down. Keep it on paper in a safe place, ideally in more than one location. Never store it digitally, never screenshot it, and never type it into any website. Anyone who gets your seed phrase has full access to everything in your wallet.
Multi-Signature (Multi-Sig)
A type of wallet that requires more than one person to approve a transaction before it goes through. Think of it like a bank vault that needs two keys turned at the same time to open. Companies, DAOs, and groups use multi-sig wallets so that no single person can run off with the funds. A common setup is "2 of 3," meaning any two out of three keyholders must sign off.
MPC (Multi-Party Computation)
A cutting edge approach to wallet security where your private key is split into separate pieces that are held by different parties. No single piece can unlock your wallet on its own. The pieces come together mathematically to sign transactions without ever being reassembled in one place. RockWallet uses MPC technology, which means even if one piece gets compromised, your funds stay safe. It combines the convenience of a hot wallet with much stronger security.
2FA (Two-Factor Authentication)
An extra layer of security when you log in to an account. After entering your password, you also need to enter a code from your phone or an authenticator app. It is like needing both a key and a secret knock to open a door. Even if someone steals your password, they still cannot get in without the second factor. Always enable 2FA on any exchange or crypto service you use.
KYC (Know Your Customer)
When a crypto company asks you to verify your identity with a photo ID, a selfie, and sometimes your address before you can use their service. It is a legal requirement in most countries designed to prevent money laundering and fraud. Not everyone in crypto is a fan of KYC because it goes against the original "anonymous, permissionless money" ethos, but it is the reality of using regulated services.
AML (Anti-Money Laundering)
A set of laws and regulations that exist to make sure people are not using financial systems to hide illegally obtained money. Crypto exchanges and wallet companies follow AML rules by monitoring transactions for suspicious patterns and reporting anything that looks off. KYC is part of AML compliance. These rules exist in traditional banking too, but they are getting more attention in crypto as the industry matures.
Phishing
A scam where someone creates a fake website, email, or message that looks exactly like a real company to trick you into entering your password, seed phrase, or private key. In crypto, phishing scams are everywhere. You might get a DM on Discord pretending to be a project admin, or a fake email that looks identical to your exchange's login page. Always double check URLs and never click links from messages you were not expecting.
Rug Pull
A scam where the people behind a crypto project suddenly drain all the money out of it and disappear. They build hype, get people to invest, and then vanish overnight with everyone's funds. It literally feels like someone pulled the rug out from under you. Rug pulls are depressingly common with sketchy new tokens and NFT projects. This is why doing your own research matters so much.
Honeypot
A sneaky type of scam token that lets you buy it but will not let you sell it. You are trapped. The creators wrote the smart contract code specifically so that only they can sell, while everyone else's tokens are stuck forever. By the time you realize what happened, the creators have already cashed out. Always check a token's contract and trading history on a blockchain explorer before buying something unfamiliar.
Trading
Exchange
A platform (website or app) where you can buy, sell, and trade cryptocurrency. Think of it like a stock market for digital coins. Popular examples include Coinbase, Binance, and Kraken. They usually charge a small fee on each trade. Some exchanges also let you earn interest on your holdings, access advanced trading tools, and convert between different cryptocurrencies.
CEX (Centralized Exchange)
An exchange that is run by a company with employees, customer support, and a CEO making decisions. Centralized exchanges are usually beginner friendly with clean interfaces and easy onboarding. The catch is that the company holds your crypto for you while it is on their platform. If they get hacked, go bankrupt, or decide to freeze your account, you could lose access to your funds.
DEX (Decentralized Exchange)
An exchange that has no company in charge. It runs entirely on smart contracts, which means the code handles everything automatically. You trade directly from your own wallet, so your keys (and your coins) stay with you the whole time. Uniswap and PancakeSwap are well known examples. The tradeoff is that DEXs can be harder to use and there is no customer support to call if something goes wrong.
Order Book
A live list that shows all the buy orders and sell orders currently waiting to be filled on an exchange. Buyers post how much they are willing to pay, and sellers post how much they want to receive. When a buyer's price matches a seller's price, the trade executes automatically. Watching the order book can give you a sense of how much demand and supply there is at different price levels.
Limit Order
You set a specific price you want to buy or sell at, and your trade only goes through if the market reaches that price. It is like telling a store "I will buy this jacket, but only if it drops to $50." If the price never hits your number, the trade simply does not happen. Limit orders give you more control but require patience.
Market Order
You buy or sell immediately at whatever the current market price happens to be. It is fast and guaranteed to go through, but you might end up paying slightly more (or getting slightly less) than you expected, especially if the market is moving quickly. Market orders are best when you just want to get in or out of a position right now without waiting around.
Spread
The gap between the highest price a buyer is willing to pay (the bid) and the lowest price a seller will accept (the ask). A tight spread usually means the market is healthy, active, and has plenty of participants. A wide spread often means low interest or low liquidity, and you might end up overpaying or underselling if you are not careful.
Slippage
When the price shifts between the moment you click "buy" (or "sell") and the moment your trade actually executes on the blockchain. It is like agreeing on a price at a market stall and then being told it costs a bit more by the time the vendor rings you up. Slippage happens more often with large trades or low liquidity tokens. Most DEXs let you set a "slippage tolerance" so the trade cancels if the price moves too far.
Liquidity
How quickly and easily you can buy or sell something without moving the price significantly. Cash is the most liquid asset there is. A rare painting is not liquid at all because finding a buyer takes time. In crypto, popular coins like Bitcoin and Ethereum have deep liquidity. Tiny, unknown tokens often have very little, which means buying or selling even a small amount can cause the price to swing wildly.
Volume
The total amount of a coin that has been bought and sold over a period of time, usually measured in 24 hours. High volume means lots of people are actively trading that coin. Low volume means there is not much interest. A sudden spike in volume often signals that something big is happening, like a major announcement or a price breakout.
Market Cap
The total value of every coin in circulation for a given cryptocurrency. You calculate it by multiplying the price of one coin by the total number of coins that exist. A higher market cap generally means a more established, less volatile project. Bitcoin has by far the largest market cap, followed by Ethereum. Smaller market cap coins can see bigger percentage gains but also carry much more risk.
ATH / ATL
All Time High (ATH) is the highest price a cryptocurrency has ever reached in its entire history. When a coin smashes through its previous ATH, social media goes wild. All Time Low (ATL) is the exact opposite: the lowest price ever recorded. Not nearly as exciting, but important context if you are trying to figure out where a coin stands in its overall lifecycle.
Bull Market
A period when prices are going up over an extended stretch of time and optimism is running high. Picture a bull charging forward and thrusting its horns upward. During a bull market, it feels like everything you buy goes up. The danger is that bull markets make people overconfident and willing to take risks they normally would not take.
Bear Market
A period when prices are falling over an extended stretch of time and fear takes over. Picture a bear swiping its paw downward. Bear markets are painful, but experienced investors will tell you they are also when the best buying opportunities appear. The projects that survive a bear market tend to be the ones with real utility and strong communities behind them.
Whale
A person, group, or organization that holds a massive amount of a cryptocurrency. When a whale decides to buy or sell, the sheer size of the trade can move the entire market. People track whale wallets on the blockchain to get early signals about what might happen next. If a whale moves a huge stack of Bitcoin to an exchange, traders get nervous because it might mean a big sell off is coming.
Pump and Dump
A manipulation scheme where a group of people artificially inflates the price of a coin by buying a ton of it and hyping it up all over social media. Once the price shoots up and outsiders start piling in, the group sells everything at the top and walks away with the profits. The price crashes immediately after, and the regular people who bought the hype are left holding worthless coins.
Leverage / Margin Trading
Borrowing money from an exchange to make a bigger trade than your balance would normally allow. If you trade $100 with 10x leverage, you are effectively controlling $1,000 worth of crypto. That means you can make 10x the profit on a winning trade, but also 10x the loss on a losing one. It is extremely risky and is the fastest way for beginners to lose everything. Most experienced traders advise newcomers to stay far away from leverage.
Liquidation
When a leveraged trade goes so far against you that the exchange automatically closes your position and takes your collateral. It happens fast and without warning. One bad price swing and your entire investment can be wiped out in minutes. During major market crashes, billions of dollars in leveraged positions get liquidated across exchanges in a single day.
Stop Loss
An automatic instruction you set that says "if the price drops to this level, sell my position immediately." It is a safety net designed to limit your losses before they get out of control. Smart traders almost always set stop losses because crypto can move fast and you are not always going to be watching the charts when things go south.
Take Profit
The opposite of a stop loss. It is an instruction that says "if the price rises to this level, sell and lock in my profits." Without a take profit order, it is easy to get greedy and keep holding while the price climbs, only to watch it crash back down and lose all those unrealized gains. Taking profit is not exciting, but it is how you actually make money instead of just watching numbers go up and down on a screen.
Dollar-Cost Averaging (DCA)
Buying a fixed dollar amount of crypto on a regular schedule, no matter what the price is doing. Maybe you buy $50 of Bitcoin every Monday. Some weeks the price will be high and you get less. Some weeks the price will be low and you get more. Over time, your cost averages out. It is the calmest, simplest, most stress free investment strategy out there, and it removes the emotion from the equation entirely.
Candlestick Chart
The most common type of price chart used in trading. Each "candle" represents a time period (like one hour or one day) and shows four data points: the opening price, the closing price, the highest price, and the lowest price during that period. Green candles mean the price went up. Red candles mean it went down. Learning to read candlestick patterns is one of the first things traders study.
ICO / IDO
ICO (Initial Coin Offering) is when a brand new crypto project sells its tokens to the public for the first time to raise funding. Think of it like a startup's fundraising round, but open to everyone. The ICO boom of 2017 produced a lot of scams, which gave them a bad reputation. An IDO (Initial DEX Offering) is the same concept but done through a decentralized exchange, which adds a bit more transparency since the smart contracts are public and auditable.
DeFi (Decentralized Finance)
DeFi (Decentralized Finance)
Using cryptocurrency and smart contracts to do all the things a bank does, like lending, borrowing, and earning interest, without actually involving a bank. It is like a robot bank that follows code instead of humans making decisions behind closed doors. Anyone with an internet connection and a crypto wallet can participate. No application, no credit check, no waiting period.
Smart Contract
A program that lives on a blockchain and automatically executes when certain conditions are met. It does exactly what it is programmed to do, every single time, with no human involved. Think of a vending machine: you put in money, you get a snack. No cashier needed. Smart contracts power almost everything in DeFi, from token swaps to lending protocols to entire governance systems.
dApp (Decentralized Application)
An application built on a blockchain instead of being owned and operated by a single company. dApps run on smart contracts, which means their logic is transparent, verifiable, and cannot be changed without community consensus. Nobody can unilaterally shut down a dApp or change its rules. There are dApps for trading, lending, gaming, social media, and just about everything you can imagine.
Yield / APY
The interest or reward you earn by putting your crypto to work in DeFi. APY stands for Annual Percentage Yield, and it tells you what you would earn over a full year if the rate stayed the same. A 10% APY on $100 means you would earn roughly $10 in a year. Be cautious of extremely high APYs though. If something is offering 500% returns, there is almost certainly a catch, whether it is token inflation, impermanent loss, or outright scam risk.
Yield Farming
The practice of moving your crypto between different DeFi protocols to chase the highest possible rewards. Farmers are always looking for the best "harvest" of interest and token rewards. It can be very profitable, but it is also complex and risky. You are exposed to smart contract bugs, impermanent loss, and the possibility that the protocol you are farming on could be exploited or rug pulled.
Liquidity Pool
A shared pot of cryptocurrency that users deposit their coins into so that a DEX can use those funds to facilitate trades. Instead of matching individual buyers with individual sellers, the DEX pulls from this pool. In return for providing their coins, depositors (called liquidity providers) earn a share of the trading fees generated every time someone swaps through the pool.
Impermanent Loss
When the value of your coins inside a liquidity pool ends up being less than what you would have had if you had just held those same coins in your wallet and done nothing. It happens because the pool automatically rebalances the ratio of tokens as prices change. The bigger the price move, the bigger the loss compared to simply holding. It is called "impermanent" because if prices return to where they were when you deposited, the loss disappears.
Staking
Locking up your cryptocurrency to help a blockchain validate transactions and keep the network running securely. In return, you earn rewards, typically paid out in the same coin you staked. Think of it like a savings account where you earn interest for keeping your money deposited. The main difference is that while your coins are staked, you usually cannot spend or move them until you "unstake."
TVL (Total Value Locked)
The total dollar value of all the crypto currently deposited inside a DeFi protocol's smart contracts. It is one of the most watched metrics in DeFi because it signals how much real money people have entrusted to a project. Higher TVL generally means more confidence and more activity. If TVL starts dropping sharply, it could mean people are losing faith or withdrawing their funds due to concerns.
Collateral
Cryptocurrency that you lock up as a guarantee when you borrow from a DeFi protocol. If you fail to repay your loan, the protocol automatically takes your collateral. In most DeFi systems, you actually have to deposit MORE value than you borrow. That is called "over-collateralization" and it exists to protect the protocol from price drops. For example, you might lock $150 worth of ETH to borrow $100 worth of stablecoins.
Flash Loan
One of the wildest concepts in DeFi. You can borrow millions of dollars worth of crypto, use it however you want, and pay it all back within a single blockchain transaction that takes just seconds. No collateral needed. The catch? If you cannot pay it back within that same transaction, the entire thing automatically reverses like it never happened. Developers use flash loans for arbitrage and liquidations, but attackers have also exploited them to drain DeFi protocols.
DAO (Decentralized Autonomous Organization)
A group or organization that is governed by code and community votes instead of a traditional CEO or board of directors. People who hold the project's governance tokens get to propose and vote on decisions. It is like a club where every member gets a say and the rules are enforced by software that nobody can tamper with. DAOs manage everything from investment funds to protocol development to charity initiatives.
Governance Token
A special type of token that gives its holder the right to vote on how a project is run. Think of it as shares in a company, except instead of a board of directors making decisions, every token holder gets to weigh in. Votes might cover things like which features to build next, how to allocate the treasury, or whether to change fee structures. The more governance tokens you hold, the more voting power you have.
Oracle
A service that feeds real world information into a blockchain. This matters because smart contracts cannot look outside the blockchain on their own. They are completely blind to the outside world. Oracles act as their eyes and ears, feeding in things like stock prices, weather data, sports results, or exchange rates. Chainlink is the most well known oracle network. If an oracle gives bad data, the smart contracts relying on it could make wrong decisions, so oracle reliability is a big deal.
Bridge
A tool that lets you move cryptocurrency from one blockchain to another. Without bridges, blockchains are like isolated islands. If you have ETH on Ethereum but want to use it on the Arbitrum network, you would use a bridge to transfer it over. Bridges are incredibly useful, but they are also one of the riskiest parts of crypto. They have been the target of some of the biggest hacks in the industry because they hold massive amounts of locked funds.
AMM (Automated Market Maker)
The engine that powers most decentralized exchanges. Instead of matching individual buyers with sellers like a traditional order book, an AMM uses a mathematical formula and liquidity pools to determine prices and execute trades automatically. When you swap tokens on Uniswap or PancakeSwap, you are interacting with an AMM. It is what makes it possible to trade 24/7 with no human market makers needed.
Vesting
A schedule that locks up tokens and releases them gradually over a period of time instead of handing them all out at once. This is usually applied to tokens given to team members, early investors, and advisors. The purpose is to prevent a situation where insiders dump all their tokens the moment a project launches, which would crash the price. A typical vesting schedule might release tokens monthly over two to four years.
Technology
Hash / Hashing
A process that takes any piece of data, no matter how large, and transforms it into a fixed length scrambled string of characters. It always produces the exact same output for the same input, but even a tiny change to the input creates a completely different output. And crucially, you cannot reverse it to figure out the original data. Think of it as a digital fingerprint. Hashing is what holds the blockchain together and keeps it tamper proof.
Node
A computer that keeps a full copy of the blockchain and helps verify new transactions. Nodes talk to each other constantly, sharing information to make sure everyone agrees on the current state of the ledger. The more nodes a network has, the more decentralized and secure it becomes because there are more independent copies of the data and more participants validating transactions.
Layer 1 (L1)
The base blockchain itself. Bitcoin, Ethereum, Solana, and Avalanche are all examples of Layer 1 blockchains. Think of L1 as the foundation or the highway that everything else is built on top of. Every Layer 1 has its own security model, consensus mechanism, and native currency. The biggest challenge for most L1s is scaling: handling more users and transactions without getting slow or expensive.
Layer 2 (L2)
A separate system built on top of a Layer 1 blockchain that is designed to make transactions faster and cheaper. Layer 2s handle the heavy lifting off the main chain and then bundle the results back. Think of it like an express lane on the highway. The main road still exists and provides the security, but the express lane lets you move much faster. The Lightning Network for Bitcoin and Arbitrum for Ethereum are well known examples.
Rollup
A specific type of Layer 2 technology that bundles hundreds or even thousands of individual transactions together, processes them off the main chain, and then posts a single compressed summary back to the Layer 1 blockchain. This massively reduces the cost per transaction because everyone in the bundle shares the Layer 1 posting fee. Rollups are currently the most popular approach to scaling Ethereum.
Scalability / TPS
Scalability is how well a blockchain can handle increasing numbers of users and transactions without slowing down or getting prohibitively expensive. TPS (Transactions Per Second) is the standard metric for measuring this. Bitcoin handles about 7 TPS. Visa handles roughly 65,000 TPS. Closing that gap is one of the biggest technical challenges in the entire crypto industry, and it is what Layer 2s, rollups, and next generation L1s are all trying to solve.
Fork (Soft Fork / Hard Fork)
When a blockchain's rules get updated, it is called a fork. A soft fork is a minor, backward compatible upgrade where old and new nodes can still work together. A hard fork is a bigger change that creates an entirely new and separate blockchain. The most famous hard fork is when Bitcoin Cash split from Bitcoin in 2017 because the community could not agree on how to increase block sizes.
Mainnet / Testnet
Mainnet is the real, live, production version of a blockchain where actual money and real transactions are at stake. When a project says it is "launching on mainnet," it means the product is going live for real. Testnet is a practice environment that uses fake coins so developers can experiment, find bugs, and test new features without risking anyone's money. Think of testnet as the dress rehearsal before opening night.
EVM (Ethereum Virtual Machine)
The engine that runs smart contracts on Ethereum. Every node on the Ethereum network runs the EVM, which is what makes it possible for programs to execute the same way everywhere. A lot of newer blockchains advertise themselves as "EVM compatible," which means developers can take smart contracts written for Ethereum and deploy them on those other chains with minimal changes. That portability is a big deal for adoption.
Zero-Knowledge Proof (ZKP)
A fascinating piece of cryptographic math that lets you prove you know something without actually revealing what that something is. For example, you could prove you are over 18 without showing your date of birth, or prove you have enough funds for a transaction without revealing your balance. ZK proofs are being used to build more private blockchains and faster Layer 2 solutions. Many people in the industry believe this technology will be one of the defining breakthroughs of the next decade in crypto.
Web3
The vision of a new internet where users actually own their own data, digital assets, and online identities, all powered by blockchains and crypto. Web1 (the 1990s) was mostly read only static websites. Web2 (the 2000s to today) gave us social media, but companies like Google and Meta own all your data. Web3 flips that model. You own your data, your content, and your digital property. Whether this vision fully plays out is still being debated, but the building blocks are already here.
On-Chain / Off-Chain
On-chain means something happened directly on the blockchain and is permanently recorded in the public ledger for anyone to verify. Off-chain means it happened outside the blockchain, like a verbal agreement, a private database, or an off-chain computation. On-chain data is transparent, immutable, and trustworthy by default. Off-chain data requires you to trust whoever is maintaining it.
Mempool
The "waiting room" where pending transactions sit before miners or validators pick them up and include them in the next block. When the network is quiet, transactions move through the mempool quickly. During busy periods, the mempool gets crowded and transactions can take much longer to confirm. Transactions that include higher fees generally get picked up first, which is why gas prices spike during high demand periods.
DePIN
Short for Decentralized Physical Infrastructure Networks. It is a newer concept where crypto tokens are used to incentivize regular people to help build and maintain real world infrastructure. For example, Helium pays people to set up wireless hotspots that create a decentralized WiFi and IoT network. Filecoin rewards people for sharing their unused hard drive storage. The idea is that instead of one company building and controlling all the infrastructure, thousands of individuals contribute pieces and earn tokens for doing so.
NFTs (Non-Fungible Tokens)
NFT (Non-Fungible Token)
A unique digital certificate of ownership for something specific, whether that is artwork, music, a video clip, a game item, or even a piece of virtual real estate. "Non-fungible" just means it is one of a kind. A dollar is fungible because any dollar is identical to any other dollar. The Mona Lisa is non-fungible because there is only one. NFTs are stored on a blockchain, which makes the ownership record permanent and publicly verifiable.
Minting
The process of creating a brand new NFT or token on a blockchain. When an artist "mints" their digital artwork, they are essentially turning a digital file into a blockchain tracked asset with a unique identifier and ownership record. Minting usually costs a small gas fee, and once it is done, the NFT exists permanently on the blockchain.
Floor Price
The cheapest NFT currently listed for sale in a given collection. It represents the minimum price to buy into that project. When the floor price is rising, it generally means the collection is gaining popularity and demand is outpacing supply. When it is falling, people may be losing interest or panic selling. Floor price is the metric most NFT traders watch first when evaluating a collection.
Royalties
A percentage of the sale price that automatically goes back to the original creator every time their NFT is resold on the secondary market. If you created an NFT with a 5% royalty and someone resells it for $1,000, you receive $50 automatically. And you receive that cut on every single future resale, forever. This was one of the most revolutionary concepts NFTs introduced for artists and creators, though some marketplaces have since made royalties optional.
Metadata
The information attached to an NFT that describes what it actually is. This includes the image or media file, the name, the description, and any traits or attributes (like "background: blue" or "accessory: sunglasses" in a profile picture collection). Some projects store metadata directly on the blockchain, which is the most permanent and trustworthy approach. Others store it on regular web servers, which means if that server ever goes down, your NFT could lose its associated content.
Crypto Culture & Slang
HODL
One of the most iconic words in all of crypto. It started as a typo. Back in 2013, someone on a Bitcoin forum was posting during a market crash and wrote "I AM HODLING" instead of "holding." The community loved it so much that it stuck, and people later turned it into a backronym: Hold On for Dear Life. It means refusing to sell your crypto no matter how bad the dip looks. HODLing has become both a strategy and a meme.
Diamond Hands / Paper Hands
Diamond Hands describes someone who holds their investment through extreme volatility without flinching. No matter how far the price drops, they do not sell. Their grip is unbreakable, like diamond. Paper Hands is the opposite. It describes someone who panics and sells at the first sign of trouble, like their hands were made of paper and could not hold on. In crypto culture, diamond hands is a badge of honor and paper hands is an insult.
To the Moon / Wen Lambo
"To the moon!" is one of the most common expressions in crypto. It means someone believes a coin's price is about to skyrocket. "Wen Lambo?" (deliberately misspelling "when") is the follow up joke, short for "When will I be rich enough from my crypto gains to buy a Lamborghini?" It pokes fun at the get rich quick mentality that runs through a lot of crypto culture, while also being a genuinely aspirational rallying cry.
FOMO (Fear of Missing Out)
That anxious, panicky feeling you get when a coin is pumping and you are not in on it. FOMO makes people rush to buy without doing any research, usually right at the top of a rally, and then the price drops immediately after. It is one of the most dangerous emotions in investing because it overrides logic and leads to impulsive decisions. The best defense against FOMO is having a plan and sticking to it.
FUD (Fear, Uncertainty, Doubt)
Negative news, rumors, or speculation designed to scare people into selling. Sometimes FUD is based on legitimate concerns. Other times it is deliberately spread by people who want to crash the price so they can buy in cheaper. When someone says "that is just FUD," they are saying the negative information is overblown or intentionally misleading. The trick is learning to tell the difference between real warnings and manufactured panic.
DYOR (Do Your Own Research)
A constant reminder in the crypto community that you should thoroughly research any coin, token, or project before putting your money into it. Do not just trust what some influencer says on Twitter or what a friend told you at dinner. Read the whitepaper. Look at who is on the team. Check whether the code has been audited. Look at the tokenomics. If you cannot explain what a project does in simple terms, you probably should not be investing in it yet.
NFA (Not Financial Advice)
A disclaimer that crypto commentators, influencers, and community members attach to their opinions about investments. It is shorthand for "I am just sharing my personal take on this, do not hold me responsible if you lose money based on what I said." Whether it actually provides legal protection is debatable, but you will see NFA tagged onto tweets, YouTube descriptions, and Discord messages constantly in the crypto space.
WAGMI / NGMI
WAGMI stands for "We Are All Gonna Make It." It is a rallying cry of optimism and community spirit, typically used to hype up a project or encourage people during tough market conditions. NGMI stands for "Not Gonna Make It." It is the snarky opposite, usually aimed at people who make what the community considers bad decisions, like selling the bottom of a dip or falling for an obvious scam.
Rekt
Crypto slang for "wrecked," meaning you lost a significant amount of money on a trade, investment, or scam. "I went all in on that new token and got absolutely rekt." It is used casually, sometimes even as dark humor. There is actually a well known website called rekt.news that documents major DeFi exploits and hacks, serving as a graveyard of failed projects and the money lost in them.
Ape In
Buying into a token or project impulsively, without doing much (or any) research first, usually driven by FOMO or hype. The image is of a monkey grabbing a shiny object without thinking about the consequences. "I saw the chart pumping so I just aped in." Sometimes it works out spectacularly. Most of the time, it does not. Aping in is the polar opposite of DYOR.
Shill / Bagholder
Shill means aggressively promoting a cryptocurrency, usually because you own a bunch of it and want others to buy in to push the price up. "He is just shilling his bags" is a common accusation. A bagholder is someone who is stuck holding a coin that has crashed hard in value. They bought when the price was high and now they are "holding the bag" of coins that nobody wants. It is not a fun position to be in.
Memecoin
A cryptocurrency that was created as a joke or is based on an internet meme. Dogecoin, featuring the Shiba Inu dog, is the original memecoin and was literally created as a parody of Bitcoin. Pepe, Shiba Inu, and countless others followed. Memecoins can deliver insane short term returns because they ride viral attention, but they can also crash to zero just as fast. They are the slot machines of the crypto world.
Degen
Short for "degenerate," but in crypto it is worn almost like a badge of honor. A degen is someone who makes wild, high risk bets on unproven tokens, farms obscure DeFi pools at 3am, and generally lives on the bleeding edge of crypto experimentation. "Full degen mode" means someone has thrown caution to the wind and is going all in on risky plays. It is both a lifestyle and a warning label.
Alpha
Secret or early stage information that gives you an investing edge before the rest of the market catches on. "I got some alpha on a new project launching next week" means someone has insider knowledge about an opportunity. In crypto culture, alpha is a form of social currency. People share it in private Discord groups, Telegram chats, and close networks. The challenge is that by the time "alpha" reaches the general public, it is usually too late to act on it.
Whitepaper
A detailed document that lays out what a crypto project is trying to accomplish, how the technology works, and what makes it different. Think of it as the project's blueprint combined with its business plan. Satoshi Nakamoto's Bitcoin whitepaper, published in 2008, started the entire cryptocurrency movement. When evaluating a new project, reading the whitepaper is one of the first and most important steps you can take.
Tokenomics
The economic design of a token. This covers how many tokens exist in total, how they are distributed (team, investors, community, reserves), whether new tokens can be created over time (inflationary) or not (fixed supply), and what mechanisms are in place to maintain or grow value. Good tokenomics means the supply and demand dynamics are designed in a way that rewards long term holders and aligns incentives. Bad tokenomics usually means insiders hold too much and can dump on everyone else.
Airdrop
When a project sends free tokens directly to people's wallets, usually as a reward for being an early user, participating in the community, or meeting certain criteria. It is like finding free samples in your mailbox. Some airdrops have been worth thousands of dollars per person. The Uniswap airdrop in 2020, for example, gave at least $1,200 worth of UNI tokens to anyone who had ever used the platform. Airdrop hunting has since become a cottage industry in crypto.
GM / GN
GM stands for Good Morning. GN stands for Good Night. They are simple, friendly greetings used constantly in crypto communities on Twitter/X, Discord, and Telegram. Saying "GM" is a way of acknowledging that you are part of the community and checking in. It sounds trivial, but these small rituals help build the social bonds that keep crypto communities tight, especially during rough markets when morale matters.
Maxi
Short for "maximalist." A maxi is someone who believes that one specific cryptocurrency is the only one that truly matters, and everything else is a waste of time or an outright scam. The most common variety is the "Bitcoin Maxi," who argues that Bitcoin is the only legitimate cryptocurrency and all altcoins are unnecessary distractions. Maxis tend to be passionate, vocal, and very confident in their position. Whether you agree or not, they certainly keep the debates lively.
Gas War
When so many people try to do the same thing on a blockchain at the exact same time that gas fees go through the roof. This typically happens during hyped NFT mints or popular token launches. Everyone is desperately bidding up their transaction fees trying to get processed first. Gas wars can push fees to absurd levels where you might spend hundreds of dollars just in gas to complete a single transaction. They also clog the entire network, slowing everything down for everyone else.
Self Custody
When YOU hold your own private keys instead of trusting a company or an exchange to hold them for you. There is a famous saying in crypto: "not your keys, not your coins." Self-custodial wallets put you in full control of your assets. Nobody can freeze your funds, block your transactions, or lock you out of your own money.
Non-Custodial Wallet (RockWallet)
A wallet where you hold your own private keys, which means you are in control of your own money. RockWallet is a non-custodial wallet, but that does not mean you are on your own. RockWallet uses key splitting to protect your wallet, so if you lose your phone or switch to a new device, your funds are recoverable. And if you ever get stuck, our support team is here to help.
MPC (Multi-Party Computation)
A cryptographic method where a private key is never created as a single whole. Instead, separate pieces are generated independently and used together to authorize transactions without ever being combined in one place. This means there is no single point of failure for an attacker to target. Some wallets use MPC for security. RockWallet uses a related but different approach called key splitting. See: Key Splitting, Shamir's Secret Sharing.
Key Splitting
A security method where your private key is divided into separate pieces that are stored in different locations. No single piece can unlock your wallet on its own. All the pieces must come together to authorize a transaction. This means that if one piece is lost or compromised, your funds stay safe. RockWallet uses key splitting, specifically a method called Shamir's Secret Sharing, to protect your wallet and make sure it can be recovered if you lose access to your device.
Shamir's Secret Sharing (SSS)
The specific key splitting method RockWallet uses to keep your wallet secure. Developed by cryptographer Adi Shamir in 1979, SSS divides your private key into a set number of pieces and requires a minimum number of those pieces to reconstruct it. For example, a "3 of 5" setup means the key is split into 5 pieces and any 3 of them are enough to recover it. You do not need all the pieces, which is what makes it resilient. Lose one piece and your wallet is still recoverable. This is the foundation of how RockWallet protects your funds and keeps them accessible even if something goes wrong with your device.
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