$BTC Bitcoin (BTC) is the world's first and largest decentralized digital currency. Created in 2009 by Satoshi Nakamoto, BTC enables peer-to-peer transactions without intermediaries. Key features include:

- Decentralized and open-source

- Limited supply (21 million)

- Blockchain technology for secure transactions

- Mining process for new coin creation

- Growing acceptance as a form of payment

As the pioneer cryptocurrency, Bitcoin has the largest market capitalization and user base. Its price volatility and market trends have a significant impact on the broader cryptocurrency market.