$BTC Bitcoin (BTC) is the first and most famous cryptocurrency in the world, created by Satoshi Nakamoto in 2009. Bitcoin uses blockchain technology to record every transaction transparently and in a decentralized manner, without requiring a central authority. The number of BTC is limited to 21 million, making it a rare asset often considered as "digital gold." BTC is widely used as a long-term investment tool and also as a means of global payment. Its price fluctuations are high, but interest in it continues to grow as institutional adoption increases and attention to decentralized finance (DeFi) rises worldwide.