In the current situation, I still believe that fiat is more important than BTC in a day to day transactions of a normal citizen.
Well, this is also my opinion. Since we can't actually use bitcoin in our daily basis, our daily transactions, I don't think people would choose bitcoin over fiat. But in the case of an investment, I don't think people would choose fiat over bitcoin or other crypto currencies since we all know, it is better to save or hold crypto currencies than fiats.