$BTC Bitcoin (BTC) is the first and most popular cryptocurrency, introduced in 2009 by an anonymous person (or group of people) named Satoshi Nakamoto. Bitcoin operates on a blockchain platform, a distributed ledger that records all transactions transparently and immutably.

The standout feature of Bitcoin is its decentralization, meaning no organization controls it. Users can send and receive BTC without going through banks or intermediaries. The scarcity of Bitcoin is also a crucial factor, with a total supply limited to 21 million BTC, creating value and appeal for investors.

Over the years, Bitcoin has experienced significant price volatility, from strong growth spurts to deep declines. Despite ongoing debates about its legality and safety, Bitcoin is still considered "digital gold" and an attractive investment for many.