Which ones will go never to be seen again?

So a lot of the time there is discussions based on the unique aspects of the various coins and what all the various projects are doing that is amazing and ground breaking in one way or another.

After the situation with Terra Luna what coins/projects do you think just simply won't be around long term and why?

This community obviously has some incredibly knowledgeable developers and reports within the arena and I'd love to see what the community thinks on this matter and why.

Also maybe we can help people really believing in this new arena of the markets avoid some very costly mistakes or loss of capital that could be potentially moved in the right direction for the benefit of this sphere and also life in general if some of these projects really pay off in ways we hope they do.

(Haha I really hope I don't see Helium on the list because I really love the concept!)