Surely Bitcoin is already an international currency.. You can use it anywhere in the world.. that's the point of it.
It is really not yet accepted everywhere in the world, though accepted in a lot of places online but when we see offline we wont get a lot of places to spend our bitcoins unless we are from Brazil or somewhere near there because there are a lot of places accepting bitcoin in that side of the world.
Yes because the government is not trying to adopt this one. If the government will just start to accept this kind of digital platform then probably it would increase the adoption percentage of bitcoin. But right now it could still be a very long process