I think not, fiat money will never be replaced by bitcoin.
because it is the tool we use for the current exchange, bitcoin is more suitable for the investment tool.
Yes Indeed, Fiat will never be replaced by bitcoin.Since in the New Era fiat or physical money is one of most useful tool in transaction, trading and so on. It will never replaced by an virtual money though it is one of a trend tools in the world still it will defest physical money since it is more convenient to use and proved and tested till this year. You are right about Bitcoin is more suitable for investment because it can be in a short and long term investment.
Its true, i am believe crypto can not replacing fiat money. Bitcoin is decentralized cryptocurrency and no one institution can control it and government or central banks must be want to control money supply. I am believe crypto will be alternative currency in internet world and can be side by side with fiat money