We are still hostages of fiat and I do not see this change, even in the long run, because governments will not surrender to crypto as means of payment.
It is impossible for fiat money to be eliminated because of cryptocurrency. During this life there is paper money will always be there as the most ideal means of payment, because there is real physical. For crypto money because digitally it is not ideal when used for small transactions. Cryptocurrency can be traded with a value calculated with banknotes. So, paper money is very relevant plus cryptocurrency and even complement each other.