that's possible, but like what they are speculating to make a primary using to entire country I think this is impossible, because of so many different kind of people in the world the unity you look forward to achieve is not possible.  But that is only alternative option to make of savings. Any way many ATM machine would be available especially in american country and Europe to make in cash of money. so I think very soon they build their own bank but the owner is I'm sure the one who support of bitcoin Mr. Bill Gates.