The government also need to control on how much money they print as the more you pront the lesser the value you will get. The Supply and Demand concept is still in place. The only different is is that BTC has a finite limit where our Fiat money has not. So that's why BTC prices are more volatile than real money
But, you have to know that when the supply becomes limited then a at some stage the price become stable and it start to run in a uniform rise because of the increasing demand with the day and when a stage come when the demand and supply becomes constant to each other then stability occurs.