This is just my opinion and none of it is proven. I just thought about it since currently the value of US dollars makes crypto beautiful. If no US dollar how can we identify the price of bitcoin and all other crypto currencies?
But if time come that crypto currencies will turn to be the current fiat currency network, then bitcoin will then be the US dollar which makes all crypto dependent to it. But until then, it not good to hurt US dollar.
Well the US dollar is in for a world of hurt long-term .