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.
If you don't trade on the Binance exchange, you don't have to hold BNB. You may not even know about such a coin, although it is also very good in terms of investment. But if you trade on Binance, you just have to buy BNB with your first trade. Because it will not only be a good investment tool for you, but also useful in terms of saving your money when trading.