Euros, South African Rands, New Zealand Dollars, Hong Kong Dollars, Polish Zloty, Malaysian Ringgits.
It is no longer just the US, EU or even China driving adoption. There is a market for Bitcoins in major countries all over the world.
That is possible to happen because Bitcoin is getting popular across the world and lots of people are already adopting the currency. Maybe someday that it would be one world one currency. But as of the moment we do still have the fiat money that is used in our daily lives.
indeed many people use bitcoin and it is not in one country but various countries in the world.
and maybe now bitcoin is doing legal process in every country and we have to support that.