I don't think so that Bitcoin would be a world power. What if one day that Bitcoin will not back up by dollar and other fiat currency anymore? Can be Bitcoin will still that strong and will exist with the kind of power that you are claiming? For me, nothing can replace the fiat as the world power as it can buy most everything in this world for centuries and Bitcoin is just hiding in the shadow of it.
I don't think so. Bitcoin will be always back up by dollar and other fiat currency especially now that they are seeing the potential of bitcoin right now. It's true that no one can replace fiat currency even in the next century because this is the one that is supported by the world bank, still I am seeing bitcoin as one that became the world power but it doesn't mean that it will replace the fiat and local currency of every country.