For the first time, when I look at the offers on LocalBitcoins.com, there are a half-dozen currencies ahead of the US dollar, offering a higher price for Bitcoin than US dollar users.
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.
So may people in the world are making use of the Bitcoin so if you look at it in that way then you could say that it is already a global currency.
But to be honest the majority of the people is not making use of it so there are allot more people that do not know what Bitcoin is.