The market will definitely not collapse until more advanced technology replaces cryptography. And this will not happen in the next 100 years. Similarly, the cryptocurrency will not disappear. I think the market is at the stage of youth and it will have a great future.
I completely agree, still far too early for people even to comprehend the significance cryptocurrencies could offer. Quite a few project to emerge in 2019 that will reveal some of its potential.
Got my eyes on Plutus, they're fulfilling the "currency" aspect of cryptocurrencies by enabling users to spend their crypto anywhere in the world that accepts visa or mastercard (like 40 million stores or something) using a card or tap&pay
https://plutus.it/ Great prospects to come imo.