$BTC Cryptocurrency is a digital or virtual form of money that uses cryptography for security. Unlike traditional currencies issued by governments, cryptocurrencies operate on decentralized networks based on blockchain technology. A blockchain is a distributed ledger that records all transactions across a network of computers, ensuring transparency and security. Bitcoin, launched in 2009, was the first cryptocurrency and remains the most well-known. Since then, thousands of cryptocurrencies like Ethereum, Binance Coin, and Solana have emerged, each with unique features and use cases. Cryptocurrencies can be used for online purchases, investment, and decentralized finance (DeFi) applications. They offer fast, borderless transactions and lower fees, but also face challenges like price volatility, regulatory uncertainty, and potential security risks. Despite the risks, crypto continues to grow in popularity and is being explored for uses in industries like finance, gaming, and supply chain management. As technology evolves, cryptocurrencies may play a bigger role in the future economy.