I think you're being a bit optimistic. The banksters aren't nationalists, aren't tied to a nation. The reach of money exceeds any nation's, including the USA.
Given political will - and money can buy that - it is trivial to regulate BTC. Any exchange can simply be eliminated if it won't play ball. Every employee of every exchange in the world can be 'extraordinarily' renditioned, and spend the rest of their lives drooling in MK Ultra programs in black sites, without exceeding the cost of lunch for just the Rothschild family for one day.
I'm not saying those particular scenarios are likely - they're not. They're not because much more reasonable means exist to compel exchanges, and holders of BTC and other cryptos, to accede to regulaton, even taxation.
We are talking about folks that intentionally profit from crimes against humanity, after all. Think of how many 'nice' ways that can be used to convince YOU PERSONALLY to say 'please, take half my BTC!'
All they have to do is 'accidentally' turn off the power, or the internet - again, a blunt force example, rather than one that requires more than one second to think about and devise.