Currently Bitcoin has been International currency many people round the world use Bitcoin as payment, but International i can say is International community, Bitcoin has solid community, people who use Bitcoin because they interest with Bitcoin they see a potential of Bitcoin, they look Bitcoin not only a currencies but also investment, knowledge and technology.
What if the problem like my country ?
My goverment still not legalize bitcoin until now since they see bitcoin will bring negative impact for my people ( money laundry for example )
To be an international currency ,it's not easy for bitcoin, IMO