Thanks for giving this reference OP. It's a great thing to ponder about and it just shows how much a lot of people have rode the hype and probably made a plan to create something that hopefully would stick. It's just that all around the world, the ones that would stay are the ones who have a lot of backing and maybe the most unique way. I do hope that there will be a way to determine what cryptocurrency will stay.
It's important to note as well that a coin could have failed but it might not be a scam it is still important to be vigilant
TBH, I thought that the percentage might be higher, but that's still a lot. Not every coin that died is a scam, that's for sure, but in the end, it doesn't really matter.