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.
well, they actually will.
as long as fiat is the only regulated and everywhere accepted payment method it will live long and prosper.
crypto needs to be accepted everywhere to make a competition with fiat.
and fore being accepted it needs being regulated and people should trust it like they trust fiat.
but anyway author's bank representatives keep in mind that crypto is another financial instrument. and that is a good thing.