This is the issue we are facing here with every coin, including Bitcoin. there probability of being used by a broad population is very low, but as bitcoin showed and still showing, as times passe the latter probability increase.
Don't forget that we are speaking about a disruptive innovation here, that is better in all ways that what we currently use.
Bitcoin started with a niche use case.
Synereo will go no where without one. Ditto every other altcoin.
maybe Synereo's niche use case will be crypto-tech community. similar to college kids for FB