There are several types of cryptocurrency, each serving different purposes. Bitcoin (BTC) is the first and most well-known, often seen as a store of value. Ethereum (ETH) enables smart contracts and decentralized applications (dApps). Stablecoins like Tether (USDT) are pegged to traditional currencies, offering price stability. Altcoins, such as Litecoin (LTC) and Ripple (XRP), are alternatives to Bitcoin, often designed for faster transactions or specific use cases. Privacy coins like Monero (XMR) focus on enhanced anonymity. DeFi tokens, including Uniswap (UNI), are used in decentralized finance applications. Each cryptocurrency varies in its functionality, security, and adoption.