Internet was also faced with almost the same challenge. During the advent of internet, people were nit ready to accept it and some said "can we be online without internet?" Despite all these, internet became acceptable worldwide, because everyone has now seen it's importance. So crypto should not be an exception. It is also facing similar challenge now, but it will overcome it.
Not that real I am afraid, there is not much opposition to cryptos, it is simply a new thing and everything that is said about it may simply be a opinion.