Crypto will diversify our economy and hence threathing the business models of most bank. Reason why they dont wna accept it.
Till the time there was nothing like that of the crypto currencies in this world, then the thinking of the people towards the money was quite different but now with the introduction of the crypto currencies, things have been changed a lot and that now people have started thing differently as they liked this idea of the crypto currencies very much and that is the reason why the demand of the crypto coins is increasing this much higher.
This new idea of digital currency is still not fully implemented as only few people of the total population of the world are actually using it. And even those who are using it are mostly use it for trading with alts or fiat. The real usage of digital currency as a payment for ordinary goods is still far away from being practically implemented.