$BTC Bitcoin (BTC) is the world's first decentralized digital currency, created in 2009. It operates on a blockchain, a public ledger that records all transactions securely and transparently without requiring a central authority such as a bank or government. BTC is often called “digital gold” because of its limited supply of 21 million coins and its role as a store of value. Investors, traders, and institutions use Bitcoin for payments, savings, and portfolio diversification. Its price can be highly volatile, influenced by market demand, regulations, adoption, and global economic conditions. Bitcoin remains the largest cryptocurrency by market value.