USA in its current incartion will lose most, because the dollar is used for saving all over the place.

But don't forget that all countries will win, because bitcoin is sound money.

Obviously the country with the strongest currency that can, to certain degree influence and manipulate the money market. I don't think I need to go on further about this, as you would have probably got the idea. Oh yeah, and also the countries where their currency becomes the world's reserve currencies.