It definitely will, of course cash won't be erased from out society, but a lot of fiat has been converted to cryptocurrencies so far and we can expect the tendency to at the very least remain stable. It'll ultimately be up to every country to gather income taxes from the cryptocurrency investors. It'll be up to the banks to help their clients invest in the cryptocurrency world rather than go against it, cashing in profits on the brokerage.

We're seeing index funds looking at cryptocurrencies, hedge funds also, on top of the futures of bitcoin, the cryptocurrency world ,while still in its infancy state, is definitely going to bring humanity through great changes of economics in most of the countries in the world.