Actually no, bitcoins are created with a limited amount. The more scarce the amount will of course the higher the value, as well as the number of users and miner bitcoin the day progressively increases.
This is what triggers the bitcoin continues to rise, as long as not been depleted of course bitcoin will continue to rise in price although maybe in time will decrease.
But if all the bitcoin is already mined it could be bitcoin value will drop in the heyday. But hopefully not.