I am not entirely sure if it will go that far. I agree that everyone who gets their own power tends to do whatever they can, and in this regard I am sure that there will be tries, but blockchain is not something that is general one word, its a whole system and that means every coin has its own, and no cex could own all chains, and most of them are decentralized chains, so even if they want to and spend money on it, they probably won't be able to. Like yeah, BNB is backed by Binance, sure, but can you imagine ETH being backed by Binance? That ain't happening, so its not really a problem for the time being.