The three biggest cryptocurrencies by market capitalization (as of recent data) are:
- Bitcoin (BTC) – The first and most dominant cryptocurrency, often called “digital gold.”
- Ethereum (ETH) – The leading smart contract platform, powering decentralized applications (DApps) and DeFi.
- Tether (USDT) – A stablecoin pegged to the US dollar, widely used for trading and transactions.