Bitcoin (BTC) is a digital currency created in 2009 that exists entirely online. It is a decentralized, peer-to-peer system that enables users to send and receive money without the need for a middleman or intermediary such as a bank.

It is powered by blockchain technology, a secure public ledger that records all Bitcoin transactions.

Bitcoin is highly secure and cannot be counterfeited or reversed. It is also easy to use, requiring only an internet connection and a Bitcoin wallet.

In addition, Bitcoin can be used to purchase goods and services, or it can be held as an investment.