Yes, this thing is possible to happen since everyone is able to access the bitcoin as world wide currency, for sure the developers will be more high tech on making the process fast, faster than what it is now, confirmation will not take that so long unlike now. And this is awaited by most bitcoin enthusiast of having this as world currency. Well if the concern is the numbers of coin I guess, if this is implemented as one currency for sure we have enough coins, fiat will be all converted to bitcoin that suits to the demand of it. WE hope this thing to happen then.