$BTC Cryptocurrency is a digital or virtual currency that uses cryptography for security, making it decentralized and resistant to fraud. Unlike traditional money, cryptocurrencies operate on blockchain technology, a distributed ledger that records all transactions transparently and securely. Bitcoin, created in 2009 by an anonymous entity known as Satoshi Nakamoto, was the first and remains the most well-known cryptocurrency. Other popular cryptocurrencies include Ethereum, Binance Coin, and Solana. Cryptos can be used for trading, investment, smart contracts, and decentralized applications (DApps). Despite volatility and regulatory challenges, cryptocurrencies continue to grow, influencing global finance and offering new opportunities in digital economies.