Pyramid Scheme

A crypto pyramid scheme is a fraudulent investment scheme where returns are paid to existing investors from funds contributed by new investors. It's called a "pyramid" because it typically has many new entrants at the bottom, with each layer representing fewer investors. Example: John starts a pyramid scheme and invites five friends to invest 1 Bitcoin each. John promises to return 2 Bitcoins to each participant in a month. John needs 10 Bitcoins to fulfill his promise, so he invites…