Bitcoin is not far from it.
Though it needs more improvement yet it has a great chance to be one world currency or money in no time.
I can see too that bitcoin will be the next generation of money. Since we are already starting it and the price of it seems to be good already and many people are already using it. There's one more thing left that bitcoin should be furnished and good to go when the gov't started to realize that this will be one of the best investment and currency.