If no one spends Bitcoin then it will automatically become useless and loose its value completely. I hope we don't get there because that will be terrible and it will spell doom for Bitcoin.
I agree, many people say that if we stop spending bitcoin the price will eventually go up and they can make profit saving bitcoin for a really long time, but everyone does that the bitcoin will die, the demand is going to go up and so is the price and people will get greedy and wait a bit more until no one becomes interested in it.
In some sense, pausing entire bitcoin system will not give any benefits to bitcoin community as well as for system itself. So, not spending also might be giving same results in long run.