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.
Right, but still bitcoin is international crypto currency. Actually we use it on online anywhere and on internet bitcoin is accept able who know about it. But only problem is that majority countries are not accept the bitcoin in government level, So that's why we can't use it in open market. Otherwise on internet bitcoin has no problem to accept it.