If no one spends bitcoins at all then the price of bitcoins will rise a lot .well thats not gonna happen near soon as people reply on bitcoins a lot for their daily uses and people who want to be rich a lot in the future wil not be using bitcoins.
I dont think soo that the price will rise up if no one spends bitcoin since there no activity on bitcoins ecosystem and also this thing would possible if the demand would arise and the supply would froze then thats the time that price will increase too.Bitcoin could possibly make us rich and it depend on how much we do have it.
yes if everyone do not spend bitcoin then the the shops and other companies will not accept bitcoin and the demand will not be much high because of that poor ecosystem of bitcoin and in that way the price of bitcoin will decrease and people will then do not wait for more with their bitcoins. So it is better that bitcoin is used as a currency for its success.