$BTC is the first and most important cryptocurrency, created in 2008 by Satoshi Nakamoto. It operates on a decentralized network based on blockchain, allowing secure transactions without the need for intermediaries.

Some key aspects of Bitcoin include:

- **Limited supply**: Only 21 million BTC will ever exist, making it a scarce and deflationary asset.

- **Security and decentralization**: It uses a consensus mechanism called proof of work (PoW), where miners verify transactions and secure the network.

- **Global adoption**: Companies, investment funds, and governments have begun incorporating it as a store of value.

- **Volatility**: Its price can experience large fluctuations due to supply and demand, regulations, and macroeconomic events.