In the year 2130 all of the Bitcoins will have been mined and the only reward at this point is transaction fees,if most people are using Bitcoin just as a store of wealth, then there are very few transactions, which means there is very little reward for mining and so a lot of computers would pull out of the Bitcoin network. Would this be a problem? If large Bitcoin transactions occurred sparingly in 2130 and beyond, would the Bitcoin concept still work?
This is just an imagined scenario and I am sure by that time (a more than a hundred years from now) Bitcoin has already evolved a lot and there is a chance that today's Bitcoin can be so radically different by that time. Anyway, I am sure that a better way can be done for this seemingly problem. Remember that Bitcoin just started in 2009 and we are talking here of a possible problem that can occur in 2140 so for me I better not think so much about it, this is just a waste of time. In most probability, Satoshi Nakamoto could have surfaced at that time and he can be the one solving this problem. And I am just kidding...