If fixed supply can be infinitely inflated (when it comes to price) and thus creating a bubble that can burst, it is not being different from supply that is not fixed.
maybe if the supply grew over time, it would just offset the price going up to some degree. that's about it. so people that want bitcoin price to "pump" they're always strong proponents for the fixed supply. now you know why.
Example, current Bitcoin price inflated by Tether printer with no real backing.
what about the joe biden printer? he's printing money out of thin air like CRAZY.