Cryptocurrency comes with its own language. For newcomers and experienced investors alike, understanding the words used across exchanges, news coverage, and regulatory announcements is the first step toward making confident decisions. This glossary brings together the most important cryptocurrency terms in clear, everyday language — no jargon, no hype, and no assumptions about what you already know.
Each entry explains what a term means, where it shows up, and why it matters for everyday investors navigating digital assets. You will find definitions for foundational concepts like blockchain and custody, market terms like liquidity and market cap, regulatory terms like security and commodity, and security terms like cold storage and seed phrase. Where helpful, entries include a simple example and links to related terms so you can build a complete picture.
CryptoRedefined built this glossary because clear definitions are the foundation of clear thinking. When you understand the vocabulary, the rest of the market becomes far less intimidating. Use it as a reference any time a word in a news article, exchange interface, or regulatory update leaves you unsure.
A platform where cryptocurrency can be bought, sold, or traded for other assets. Exchanges vary in regulation, custody model, and the protections they offer customers.
Example: A spot exchange lets you swap U.S. dollars for Bitcoin at the current market price.
Related: Custody, Liquidity, Wallet
Locking up cryptocurrency to help operate a proof-of-stake blockchain in exchange for rewards. Staking can earn returns but may lock funds or carry risk if the network or validator fails.
Example: Ethereum holders can stake ETH to help secure the network and earn rewards.
Related: Validator, Proof of Stake, Yield
A tool — an app, a device, or a piece of software — that stores the keys used to control cryptocurrency. A wallet does not hold coins directly; it holds the keys that prove you own them.
Example: A hardware wallet stores your keys offline so they cannot be stolen by malware.
Related: Cold Storage, Seed Phrase, Custody
A shared, publicly verifiable database that records transactions across many computers at once. Because no single party controls it, records are extremely difficult to change once confirmed.
Example: Bitcoin's blockchain records every BTC transfer in a permanent, public history.
Related: Node, Decentralization, Consensus
A system design where control is spread across many participants instead of held by one company or authority. Greater decentralization generally means no single point of failure or control.
Example: No single company can shut down a truly decentralized blockchain network.
Related: Blockchain, Node, Consensus
How easily an asset can be bought or sold without moving its price. High liquidity means many buyers and sellers are active; low liquidity means a single trade can swing the price.
Example: Bitcoin is highly liquid — large trades barely move the price — while a small new token may not be.
Related: Market Cap, Exchange, Slippage
A measure of an asset's total value, calculated by multiplying the current price by the number of coins in circulation. It helps compare the relative size of different cryptocurrencies.
Example: A coin priced at $2 with 100 million coins in circulation has a market cap of $200 million.
Related: Liquidity, Circulating Supply, Volume
A basic good or interchangeable asset, often regulated by the CFTC. Some cryptocurrencies are treated as commodities rather than securities, which changes which rules apply.
Example: Bitcoin has been treated as a commodity under U.S. law.
Related: Security, CFTC, Digital Commodity
A legal category for an investment where money is pooled with the expectation of profit from the efforts of others. In the U.S., securities are regulated by the SEC and trigger disclosure and registration rules.
Example: A token sold with the promise that the founders will build the business and create profit may be treated as a security.
Related: Commodity, Investment Contract, SEC
Keeping cryptocurrency keys offline, disconnected from the internet, so they cannot be reached by hackers. Common forms include hardware wallets and paper wallets.
Example: Storing long-term holdings on a hardware wallet kept in a safe is a form of cold storage.
Related: Wallet, Custody, Seed Phrase
The safekeeping of cryptocurrency on behalf of an owner. Self-custody means you control the keys; third-party custody means an exchange or service holds them for you.
Example: Leaving coins on an exchange is third-party custody; moving them to your own wallet is self-custody.
Related: Wallet, Cold Storage, Exchange
A list of 12 to 24 words generated by a wallet that can restore full access to your funds. Anyone with the seed phrase can control the wallet, so it must never be shared.
Example: If you lose your hardware wallet, the seed phrase lets you recover your funds on a new device.
Related: Wallet, Cold Storage, Custody