I also do not believe that traditional currencies will leave our lives, but I think that the cryptocurrency will be able to work with Fiat money on a level. I think I still need some time passed people to take bitcoin as a forum of payment.
It will be gone but not so soon.
cryptocurrency will definitely replace them, though this need more time of waiting as there are so many people who dont know what it is and how to deal with it.
But definitely in the future it will. different countries will have their own crypto.
that wont happen bro . crypto already existed for a couple of years but fiat are still here and even if many people already here and use cryptos , they still use and prefer fiats . thats only an indication that fiat money is the best currency among other . we can use fiat anywhere while crypto cant simply do this .
Banks and cryptos or fiats and cryptos will only work to each other because crypto isnt also possible without fiats and banking system .