The only crypto
currency that's really delivering and not endlessly promising is
Monero 
I stopped predicting which technology would prevail based on the fundamentals years ago. That goes for any technology.
HD DVD, for example, was technically superior to Bluray, yet it is now obsolete. Same with Betamax, which lost to the inferior VHS.
Fundamentals are only part of the story. There are many other factors that determines a project's success.