Bitcoin is a digital currency that enables peer-to-peer transactions. It's decentralized, meaning it's not controlled by any government or institution. Bitcoin was launched in 2009 and is the first and largest cryptocurrency.

Key features of Bitcoin:

- Decentralized: Bitcoin operates independently of central banks and governments.

- Digital: Bitcoin exists only online and isn't physical like traditional currencies.

- Limited supply: There will only ever be 21 million Bitcoins in existence.

- Fast transactions: Bitcoin transactions are quick, taking just a few minutes to process.

- Secure: Transactions are secured through cryptography, making them safe and trustworthy.

You can buy, sell, and use Bitcoin for online transactions. It's an interesting and rapidly evolving field!