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...
your belief does not even have the right to happen . Bitcoin gonna be a Main Currency ? lol this will never come because Fiat will never leave and bitcoin will stay with fiat for lifetime
so the argument you are pointing wont even get close to the reality.
Dont worry Bitcoin value will be determined when the adoption happens , when majority of the country uses and accepted this then that will be the deciding factor if how and why will bitcoin be accepted in payments for daily purpose .