$BTC Bitcoin (BTC) is the original and largest cryptocurrency, launched in 2009 by an anonymous entity known as Satoshi Nakamoto. It's a decentralized digital currency, meaning it operates without a central bank or single administrator.

BTC transactions are recorded on a public, distributed ledger called the blockchain, maintained by a global network of computers (miners). This ensures transparency, security, and immutability. Bitcoin has a limited supply of 21 million coins, contributing to its "digital gold" narrative and making it resistant to inflation. While its volatility is well-known, BTC is widely regarded as a store of value and a foundational asset in the crypto world.