then it goes peer to peer. i don't really see how they're gonna stop that.
in the meantime countries where it's fully legal like japan will thrive and other countries will compare the wreckage that america creates.
since no one can control any cryptocurrency they'll have to ban all of them. and i mean proper ones, not stuff like ripple.
the only truly likely possibility is exchanges being forbidden from dealing with stuff like monero and even that's a long shot.