$BTC Bitcoin (BTC) is a decentralized cryptocurrency created in 2009 by a person or group under the pseudonym Satoshi Nakamoto. It operates without the need for a central bank, using a network of users who validate transactions through blockchain technology. Its supply is limited to 21 million coins, which reinforces its deflationary nature. BTC is valued both as a store of value — "digital gold" — and as an alternative means of payment. Its price is highly volatile, but it has gained global popularity as a financial asset. Over the years, it has driven the development of the crypto ecosystem and the adoption of decentralized technologies.