It defintely will crash and burn. Okay at least crash an never revisit those highs, remeber that we have has similar situations with bitcoin cash and btc.. the eth fees will go down and the bsc will lose its relavency.
It seems that the BSC will not just disappear when ETH costs have decreased and stabilized at a low rate, because they are basically on a different path so that investors and new project developers can make the choice of which one they will choose for their business.