I can see that the bitcoin is spreading and to me it wont come as a surprise to see that the bitcoin is being used all over as an official currency. It is the dream I have always had and am so hoping that it will come to pass soon than later.
Yes probably if no country is willing to make bitcoin as a currency of the country that may occur.
But must be made in the currency bitcoin to meet the requirement that a currency must have the form as a medium of exchange
Bitcoin can be a national currency for countries that are about to be bankrupted and their national currency having downfall.