Earlier quoted context omitted.
The problem is the whole idea of cryptocurrency as a growth investment. The symptom is a bunch of copycat scams trying to freeload on the broader market. Without the bull market of the early '90's, Belfort would have had no one to sell to. Same deal here. The root cause is the insanity happening in bitcoin (and now Ethereal, I guess). Mark my words: this will all come crashing down. I can't tell you when or why, but…
The worst of is that early adopters will cash out boat loads of money and use that fact to claim they were right all along, as if somehow the top of the pyramid making money proves it's not a pyramid.
With crypto, if anyone leaves or growth stops the price simply goes down. It doesn't collapse. It's more like stock.