off course the bitcoin is already become a international currency now because it is using by so many people of varrious countries .the performance of bit coin is also accepted by users so it become verry popular site now a days.
bitcoin is used by various people around the world from different countries and it proves that bitcoin worth anywhere and I think now we can say that bitcoin is an international currencyYes since almost country has an access on using bitcoin, it is just that our choice to use it. I hope one day this international currency be implemented and accept by the government. How kool will it be when we shall see all nations, one currency and that too is bitcoins.
If the government accept it, the popularity and users will grow and merchants would recognized it as payment method. i think it wont be long until it happen because btc is number one online currency and many are using it not just to buy things but also for investment.
It has become a kind of currency, but nowadays, people are tending to hold it or use it as a investment process.
And moreover even if the merchants uses BTC, consumers or common peoples might not transact due to delay in payments plus the increasing high fees.