Well i guess its YES 
but it will takes many many years before its all implemented in all over the country.
but it will takes many many years before its all implemented in all over the country. I don't think that crypto can replace fiat money. Fiat will still be used eventhough cryptocurrency specifically Bitcoin to become the future currency, because fiat (traditional currency) is one of the identity of country, it can't be replaced. And not all government accepts crypto. And actually some of them banned the use of cryptocurrencies.