Many people think that BNB can replace ETH. And that has happened that BNB does have an excellent development. And the increase in trading volumes is very high and this happens when many coins have decreased. But it is very difficult to replace ETH because ETH also continues to be the main choice as a platform.
Many people think that ethereum can be replaced, but it can`t. Ethereum have a strong team behind and they have excellent development. Bnb is exchange coin, and platform, it`s a good idea and they made nice progress this year, they are in the top 10, and they got there pretty fast if you ask me. Now they will need to stay there and prove they worth to be there.
BNB is simply a token of the exchange, and it depends on Binance. If something happens to it, it can even vanish, as it will be not supported anymore. Ethereum is different, and after Ethereum 2.0 is launched, it will become even more attractive to investors. BNB will never overtake ETH, although it will stay popular until the exchange works well and attracts people, who want using the best services.