My guess is that Binance is trying to minimize interaction with US customers that can give the various Federal authorities an excuse to come after them for some crime or other.
I don’t buy many of the above comments that Binance thinks its large enough to make a difference in the path or ultimate destination of the dollar, or that it is part of their motivation.
No one above knows anything about crypto. They will be buying and selling in crypto within a year or two. Crypto is already written into the tax code.
We are going to war and US doesn’t want US Citizens to be able to transfer money out of the country in case there is an attack on the USD. Simple as that. China has done the same thing.
This affects non-citizens? They cannot convert to dollars.