Pyramid scheme can make money, if you're one of the early ones, then quickly withdraw and jump ship

When it gets unsustainable is more people join, thus requiring more money to pay out, and that needs more money to come in.

Like stock market/cryto climbing, you can profit on the way up. But if you too slow or messed up, you'll be left holding the bag when everything crashes

Lo atl 1.53, what an unfortunate/double-edged name. - Ken Gamble, Scam Investigator