Bitcoin is a decentralized digital currency that enables peer-to-peer transactions without the need for a central authority or intermediary such as a bank. It was created in 2009 by an anonymous person or group of people using the pseudonym Satoshi Nakamoto.

Bitcoin is based on blockchain technology, which is a distributed ledger that records all transactions in a secure and transparent manner. This means that every transaction made with Bitcoin is recorded on the blockchain and can be verified by anyone.

One of the key features of Bitcoin is its limited supply. There will only ever be 21 million Bitcoins in circulation, which makes it a scarce asset. Bitcoin can be bought and sold on various exchanges and used as a form of payment for goods and services by merchants who accept it.

Bitcoin is also known for its volatile price movements, which can fluctuate rapidly due to various factors such as market demand, regulatory changes, and media coverage. Despite its volatility, Bitcoin has gained widespread adoption and is considered by many to be a potential alternative to traditional currencies and a store of value.