I dont know how we are going to remove fiat money from our life especially because we are being run by the government which only supports fiat money sure it is because it is money that they just can manipulate, I mean they could easily print more money at any time they want and then inflation hit just like that it doesnt really matter what its effect on use, inflation is just going to hit and make us broke so obviously Bitcoin which is a digital gold is actually a good way to store value in the future.
Probably the way I see things in the future is both fiat and Bitcoin are still going to exist but Bitcoin is just going to be huge for most countries or even around the world where it is already used in our everyday life since it is already adapted in a lot of countries to the point where even small stores are already accepting Bitcoin kinda similar to e-wallets that we use to pay online which is already accepted in a lot of stores. Probably cash is still going to exist but everyone is just using Bitcoin as a form of payment.
When the Bitcoin is already mine we dont really know how it is going to happen but in the future upgrades in the network for sure are going to be a thing for fast transactions and low to zero fees. Also, volatile market prices could be a thing that is probably going to make it great as an investment.