It is already a international currency as majority of people across the globe are using it, the only thing we need is that it should hit the mainstream to get more popular in future.
Yes it is because as we all know bitcoin is most powerful and popular crypto currency in all. Most of the people prefer bitcoin than the rest. In a matter of fact, bitcoin is peer to peer electronic money system and used as transactional tool. I am favor with this because there are many investors who support bitcoin as well as people who enjoy doing bitcoin. Majority of the people used bitcoin that's why it id possible to make it happen.