BTC was created with a new transaction system without a central authority. The BTC can be used in the future as the main currency that we gonna pay with. But what's gonna be the value of a main currency? What's the value of dollars or eur?
-Answer is: The dollar IS the value. The dollar doesn't cost anything. The dollar is the value.
If BTC is gonna be used in future, it not gonna cost anything, because the BTC is gonna be the value. It not gonna be like Bitcoin cost 50,000dollars... Bitcoin not gonna cost anything because Bitcoin IS the value. But that's probably not gonna happen. We not gonna pay with BTC but with stable coins like USDT...
I don't think value will be dependent upon the adoption instead valuation will be more dependent upon the play by the whales, adoption as you can see is much more than what it was an year ago but still the price of Bitcoin is somewhat less than what it was a an year ago. I think whales are going to continue their own play with the price and adoption is going to happen side by side.