I do not think so. I think the bitcoin future will be a global currency used by all nations in the world. The world economy is growing and bitcoin is born to meet that development demand, people will respond and use the features of bitcoin effectively. And I believe, with that potential, with that bright future, the bitcoin will grow as we expect.
We all expect bitcoin as a global currency for border-less transactions. It may happen but definitely not in quick time as there are lots of places where people still not having access to internet. So, probably the first step toward bitcoin as a global currency must be reaching out of internet to every part of this world. After that only we can see bitcoin will be evolving as a global currency.
If we talk about the potential of the bitcoin, then I dont really think so that there will be any such reason to oppose this thing that bitcoin cannot become a global currency. However, this is very much difficult thing to do and that there are so many hurdles which will come in the way of bitcoin while becoming a global currency. Still we can hope for the best and that we can expect bitcoin to be the global currency one day.