It wont be accepted as a global currency until some regulations are made. But digital currencies will be the future but not very soon as we expect. Bitcoin will force governments to take digital currency right away.
Yes, government should recognized the bitcoin first so that they can create a law in regards with bitcoins. bitcoins as global currency? why not, low cost of fee could be a good help but i guess, once the government took care the rules on using bitcoins, i am sure that tax will also applied on every transactions, i am wondering of all merchants will accept bitcoins, will they increase fees on every transactions? What if there is no connection? How it can be use?