I don't think if Binanace BNB can beat Ethereum ETH because it is almost impossible.
I know BNB is really good coin, but to beat ETH is need more than good coin and good exchange.
That mean good blockchain like ETH have ERC-20 and almost all new token used that blockchain and making Ethereum is bigger.
trust in the quality of ethereum is very far now. although BNB is considered a coin that is able to compete in the altcoin world and has great potential, I also feel that BNB will not be able to exceed ethereum. we don't know what the future will be like, but for now, BNB will not replace ethereum.