I think the is very strong, as long as the humans are alive the possibility difficult of to end, just look at its development is now very rapidly and its value is getting higher. Now comes another crypto, it is difficult to happen if is replaced with another crypto.
Yeah as it is just in its early stage and only 1% of the people in the world are those who own crypto currencies so we cannot say that is going to end very soon. I think that will survive for a long time because is the need of the modern time and people will like to adopt for their online business and for shopping online.
I am sure that will be even use in offline shops, but it will take some more time, when the users of increase more and more as the revolution is not started yet and hopefully the revolution of cryptocurrencies will be coming in the near future and adoption rate of it will also increase.