If fixed supply can be infinitely inflated and thus creating a bubble that can burst, it is not being different from supply that is not fixed.
Example, current Bitcoin price inflated by Tether printer with no real backing.
https://i.imgflip.com/8pplvd.jpgBTC supply isn't inflated, wtf are u talkin' about?
reread yourself, you seem confused on the difference between price and supply.