$BTC BTC (Bitcoin) is the first decentralized cryptocurrency, founded in 2009 by Satoshi Nakamoto. It is based on blockchain technology to enable peer-to-peer transactions, with a total supply fixed at 21 million coins, which gives it scarcity and anti-inflation characteristics. Its currency pair trading (such as BTC/USDT) is conducted through exchanges or over-the-counter, supporting high liquidity and global circulation, but the price is highly volatile and significantly affected by policy and technological risks. Trading requires attention to private key security and exchange compliance, while institutions adopting blockchain technology development brings long-term value potential.