There are no doubts on this subject. I belive aswell that cryptocurrencies cannot be stopped but we must be aware aswell that there are still in the early phase and for some people that have a certain age is super hard to explain to them that in this days we have virtual money and a sytem that really works called blockchain ....
There is definitely a great future for cryptocurrency, but for now it will not be massive. In any case, the cryptocurrency will be implemented in different spheres of human activity, but mass use will be only when generations change. The fact is that older people are not ready to use cryptocurrency now.