But, we also know and aware of the fact that fiat is controlled by governments and central banks, whereas bitcoin is a far better currency, which is decentralized and can't be controlled. So those two things do not really look like it makes sense, if we know bitcoin is better currency than fiat, then why are we spending fiat everyday? Why are we all not turning into bitcoin users? Not just investment, but as a currency too? That seems like a confusing situation and I do not know the reason.
Because as I said, this world is still controlled and managed by governments and central banks, and they need to ensure their interests above all else.
Bitcoin seems to be better than fiat in many ways and it is good for us, but not good for governments and banks. Because using a currency that is not controlled by the government will make it very difficult for them to control the people, while central banks will have difficulty regulating the economy. Their power will be weakened and the economy will also become worse because of ineffective management. So it is not too difficult to understand that although bitcoin is good , it can never replace the role of fiat. Governments and central banks will do everything they can to prevent that from happening.