Fixed supply of BTC doesn't matter, when the price can be infinitely inflated by Tether printer.
There are 2 components of the price: the price to get Bitcoin via PoW and the speculation "add-on". Tether part is speculation and can burst at any second (and it usually does in crypto winter).
On the other hand, the fact that the supply is fixed comes with acknowledging that bitcoin is
very scarce, hence inviting the ones smart enough to invest in it. And from there the price grows in a correct, organic manner.
However, you may not care about this, or maybe you just want to troll. And a famous quote pretty much applies here:
If you don't believe me or don't get it, I don't have time to try to convince you, sorry.