To paraphrase Rodney Dangerfield, "When you own crypto currency, you own an electron's fart."
With stock, somewhere is a physical object...A factory/company. Manufacturing or intellectual property.
With crypto...There is no physical manufacturing or intellectual output on which to base wealth. There has to be someone running a Data system somewhere. If there are none, if they all stopped, there is no way to cash out.
It is the ultimate pyramid...The earlier activities get money from the later pursuers, leaving the latecomers high and dry.