I do believe bitcoin has achieved those status of internation currency already, countries and a big part of the population hasnt recognized it yet but we are able to send any ammount between countries soo its just a question of time till bitcoin be accepted and recognized.
It is already used as a international currency but as of now there are still flaws that needs to be furnished because there are still many countries that are not yet accepting bitcoins. But many are already using it as a gateway of transacting to anyone in the world. So it is good to be considered that bitcoin is already an international currency.
It is indeed used as one and I think that it can come very far but it needs some help and than maybe it can accomplish doing this, right about that.