BNB Chain (BNB) is Binance’s smart contract layer 1 platform. Its use cases remain almost entirely on decentralised exchanges, lending protocols and liquid staking. This makes it a much more concentrated and ‘old-fashioned’ smart contract platform than rivals such as Ethereum and Avalanche. BNB is the fourth-largest non-stablecoin digital asset (by market cap in circulation) after Bitcoin, Ethereum and XRP.