$BNB BNB refers to Binance Coin, the native cryptocurrency of the Binance exchange, one of the world's largest cryptocurrency platforms. Initially launched as an ERC-20 token on the Ethereum blockchain, BNB has since moved to its own blockchain, Binance Chain. BNB serves various purposes within the Binance ecosystem, such as paying for transaction fees, participating in token sales, and powering decentralized applications. Over time, the coin has grown in value and utility, becoming a widely recognized digital asset. It is also used in various DeFi (Decentralized Finance) projects, further solidifying its role in the broader crypto space.