Bitcoin is more than international currency now, people of almost every contry is aware about the price and popularity of btc .
market cap of BTC is more than half of the countries's on globe .
I already treat it by myself as an international currency. As there are so many people who are using it that can be found in every part of this world. And that's why many of us here are already thinking that bitcoin became already an evolution to the usual way of currency that can be used to a certain place or only within their country. And I also believe that there will be only one world currency, I hope it will be bitcoin.