Unfortunately the common people still consider cryptos as virtual or internet money which is backed by nothing and may collapse anytime, untill people get more awareness about blockchain technology and cryptocurrencies and the negative perception goes away the mass adoption will still remain a distant thing.
It is very simple to deal with something like that, namely by ignoring people who still consider cryptocurrency as a negative thing, just show a fair result to such a person and he will eventually like cryptocurrency and will explore crypto himself.