GLOSSARY · BLOCKCHAIN & WEB3
Exchange (Cryptocurrency Exchange)
What a crypto exchange is and how it works: CEX vs DEX, which license the EU requires (CASP) and how to choose one with clear criteria.
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What is a crypto exchange?
A cryptocurrency exchange is a digital platform that facilitates the purchase and sale, exchange and, in some cases, the custody of digital assets, such as Bitcoin, Ethereum or ERC-20 tokens. It operates as a specialized financial infrastructure that connects buyers and sellers, offering liquidity, order matching and access to different trading pairs (e.g. BTC/USDT, ETH/DAI, etc.).
There are two main types of exchanges:
- Centralized (CEX): managed by a company, which acts as an intermediary and custodian of funds. They offer high liquidity, advanced tools, fiat support, and services such as staking, futures or margin trading.
- Decentralized (DEX): built on blockchain, they allow peer-to-peer exchanges using smart contracts without the need to give up custody.
An exchange performs key functions such as:
- Fiat ↔ crypto conversion (on-ramp and off-ramp)
- Real-time trading with technical analysis and order book
- Liquidity management for digital asset markets
- Storage in custody wallets or connection to external wallets
- Regulatory compliance through verification processes such as KYC/AML
In addition, it is the entry point for investors, traders, companies and retail users, making it critical infrastructure for the mass adoption of Web3 and the crypto ecosystem. Its importance lies in offering global access, competitive pricing, financial tools and, in many cases, additional functions such as staking, lending, launchpads or airdrops.
Learn more: What Is Blockchain and How Does It Work? Types, Real Examples and Limits
Explained simply
An exchange is like a digital store or marketplace where you can exchange traditional money for cryptocurrency, or exchange some cryptos for others. You can buy Bitcoin, sell Ethereum, or convert USDT into another digital currency. It's where you go to start using cryptocurrency quickly and easily, with prices updated in real time.
Exchange: key points
- Platform for buying, selling and exchanging cryptocurrency
- Connects buyers and sellers using digital tools
- Can be centralized (CEX) or decentralized (DEX)
- Facilitates entry to the crypto ecosystem from fiat money
- Supports multiple trading pairs and financial functions
Exchange: advantages
- High liquidity and immediate market availability
- Easy access to the crypto ecosystem from traditional currencies
- Diversity of assets and financial services in one place
- Advanced trading, charting and analysis tools
- Benchmark for prices and global market trends
Exchange: disadvantages
- Third-party dependency on centralized exchanges
- Risk of hacking or account freezes on insecure platforms
- Trading and withdrawal fee costs
- Complexity for beginners in environments with advanced features
- Regulatory obligations and loss of privacy in CEX with KYC
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