Bitcoin is mostly about the United states
No it is not. The big move in bitcoin that made it mainstream came in 2013 when Cyprus confiscated the savings of it's people to bail out the banks.
Basically countries like the USA and UK, which have had a very long period of rule of law, are not the drivers of bitcoin because the dollar and pound are trusted by their citizens. The same goes for Sweden and Denmark, they are stable countries who control their own currency.
Bitcoin is of benefit to those countries who DON'T have the rule of law and are thus very dangerous. So Argentina, Venezuela, various places in Africa and Asia, and the eurozone countries.
The biggie for Bitcoin is March 2017, when France has it's elections. One of the candidates wants to leave the euro. Changing currency brings instability and I expect funds will rush into bitcoin, gold, the dollar, pound and swiss franc just before the election.