What chain is Binance on?

Could you please clarify which specific chain you are referring to when you ask about Binance being on a particular chain? Binance, as a cryptocurrency exchange, supports transactions on various blockchains, including Bitcoin, Ethereum, Binance Chain, and Binance Smart Chain, among others. So, it's not accurate to say that Binance is "on" a single chain. Instead, it provides services for users to trade and interact with various digital assets across multiple blockchains. Is there a specific blockchain or use case you have in mind when asking this question?