Even when short of an outright scam, a major factor is the idea that participating in a doomed mess can be profitableas long as your can sell to another person

Even when short of an outright scam, a major factor is the idea that participating in a doomed mess can be profitableas long as your can sell to another person before the end. https://en.m.wikipedia.org/wiki/Greater_fool_theory https://en.m.wikipedia.org/wiki/Greater_fool_theory