well obviously those who are against bitcoin and are banning it, are the first that will lose much then you have those that are restrcting it
instead those that are regulating and taxing it i think they will gain more
if they join the mining or buy more bitcoins, they will not worry about the crash of their debt, meaning they won't be affected by the financial crisis.
no use on banning bitcoin, get to mix between their fiat and the bitcoin is the best solution.
US is probably losing the most if bitcoin become the currency of the planet earth i guess, US dollar is the most trusted as of now.