As of the moment, while the bitcoin price in the market is increasing the gas fee of ETH so far was too expensive. but even is like that, still the Ethereum remain dominant where some of the cryptocurrency can't do it. But I could say that there are some of the altcoins out there were it could be next into ETH in which BNB in my own opinion.
Agreed， ETH is the king of the altcoins now, but who could sure it still is it in the future, indeed BNB is a strong competitor, and it is very promising, besides, there are other competitors, like EOS,DOT,etc.