I agree with you. We still can not live without a mint currency. It is of great importance in our life. But we must also use bitcoin to make it even more popular
Each country have their own legitimacy against bitcoin. For example my country forbid bitcoin usage since it can be use for money laundry ( terorism advantage ) so It's hard for my people to trust bitcoin at the moment.
Luckily I can still use bitcoin but with my own risk ( my goverment can't arrest me for bitcoin usage protocol )
My country's government is also negative about bitcoin. But there is still no prohibition. Therefore, for the time being I can freely buy and sell this coin.
Fiat for me is also important, because I can not live without it
If there is no internet we can not use them so fiat will stay remain..