What are the real-world applications of cryptocurrency?

Cryptocurrency has several practical real-world applications beyond speculation. Bitcoin serves as a store of value and hedge against inflation, similar to gold. Ethereum enables smart contracts—self-executing agreements that power decentralized finance (DeFi) applications like lending platforms where users earn interest on deposits. Stablecoins like USDC facilitate fast, low-cost international payments and remittances, especially in countries with unstable currencies. Some companies accept cryptocurrency for payment, including major retailers. Blockchain technology, the underlying infrastructure, is used for supply chain tracking, healthcare records, and voting systems. El Salvador adopted Bitcoin as legal tender in 2021. Additionally, cryptocurrency enables financial services for the unbanked—over 1.7 billion people without traditional bank access can participate in DeFi using just a smartphone and internet connection.