Which cryptocurrencies are being used for real world purposes today?

Several cryptocurrencies have practical real-world applications today. Bitcoin serves as a store of value and payment method in some countries like El Salvador, which adopted it as legal tender. Ethereum powers decentralized finance (DeFi) applications where users borrow, lend, and trade without banks. Stablecoins like USDC and USDT, pegged to the US dollar, facilitate cross-border payments and remittances. Ripple's XRP enables faster international money transfers for financial institutions. Chainlink provides real-world data to blockchain applications. Some supply chain projects use blockchain to track product authenticity. However, mainstream adoption remains limited, with most cryptocurrencies still primarily used for trading and investment rather than everyday transactions.