You probably don't know anything about supply and demand because if you do, you shouldn't be saying that Bitcoin having a fixed supply of 21 million isn't enough for it to grow in value over time because this happened because of the rule of supply and demand where the demand of Bitcoin kept increasing and because the supply is fixed, and not all the coins were in circulation, its value kept going up.

I think you need to do some research about Bitcoin's history to understand how it works what was its value in the initial days and how it struggled to be where it is today. You are right that it has great powers because it is a great innovation, but the limited supply metric is enough for it to be what it is.