Presently, there is no comparism between the two,because crypto is yet to be accepted, but very soon,it is going to be accepted and it will be difficult for our national currency to function without crypto
The crypto cant replace the national currency as for today since it is not stable for now and has a limited supply. Also cryptocurrencies are being used as an asset rather than being a currency for we really can get more profit from it. But we never know in the future bitcoin or other cryptocurrencies will replace national currency