Earlier quoted context omitted.
That isn't how a Ponzi scheme works, a Ponzi scheme directly uses fees taken from new members to pay out older ones, lying and saying it's from actual business activity. Crypto doesn't behave any differently than the stock market (except the fundamentals are a little shakier, okay, a lot shakier).
Cryptocurrency doesn't have dividends or share buybacks which are what make stocks have inherent value.
Crypto is only valuable, because others think so, too. You control a place inside a distributed list. Others think a place in exactly this list is valuable, while all the other lists are shitcoins.