What is a Ponzi scheme

The core mechanism#

A Ponzi scheme pays returns to existing investors using money collected from new investors, rather than from any real profit-generating activity. As long as new money keeps coming in faster than existing investors withdraw, the scheme can keep paying out and looks like a legitimate, successful investment. It collapses the moment new deposits slow down or a wave of investors tries to withdraw at once — because the money to pay them was never actually generated by trading, it was other investors' deposits.

Where the name comes from#

The scheme is named after Charles Ponzi, who ran a scheme based on postal reply coupons in Boston in 1920 — but the structure itself predates him and has been reused constantly since, across every asset class from real estate to forex to cryptocurrency.

How to recognize one#

• Consistent, unusually high returns regardless of what markets are doing — real investments fluctuate; Ponzi schemes typically don't, because the "returns" are just accounting entries.
• Vague or secretive strategy — pressed for details on exactly how the returns are generated, promoters give evasive answers, cite a "proprietary algorithm," or discourage questions.
• Emphasis on recruiting new investors, sometimes with commissions for bringing others in — a sign the scheme depends on constant new money rather than real performance.
• Difficulty withdrawing — early on, small withdrawals are often paid promptly (to build trust and generate word-of-mouth); larger or later withdrawal requests get delayed, discouraged, or blocked outright.

Related terms#

A pyramid scheme is a close relative that pays participants primarily for recruiting others, rather than for any product or investment at all. See our case files on OneCoin and BitConnect for two of the largest Ponzi/pyramid schemes ever prosecuted.