ETH has become the ICO coin, and unfortunately this has also brought a bad side, and now we have tokens popping around everywhere and ICOs are dying ...
I think BNB will not be used in the same way, as Binance will not allow the cahos to settle in and I think their objective is to be more selective and strick, bringing more trust to the platform and their token... I don't think we will ever see it being "over-used" like ETH