Some investment opportunities seem too good to be true, promising high returns with little to no risk. While some are legitimate, others are a type of fraud known as a Ponzi scheme. At its core, this scheme is a simple shell game.

Instead of generating actual profits from a business venture, the organizer shuffles money from new participants to earlier ones. This creates the illusion that the investment is successful. Early investors receive their promised returns, which builds confidence and attracts more people through word of mouth. The problem is that the entire operation relies on an ever-increasing stream of new cash. There's no real business creating value.

This type of fraud gets its name from a man who perfected the technique in the early 20th century.

Charles Ponzi, an Italian immigrant to the United States, didn't invent this kind of scam, but he made it famous. In 1920, he launched a scheme in Boston that became a sensation. His plan was supposedly based on international postal reply coupons, which could be bought in one country and exchanged for postage stamps in another.

Ponzi noticed that due to currency fluctuations after World War I, he could theoretically buy coupons cheaply in other countries and redeem them for a much higher value in U.S. stamps. He promised investors an incredible 50% return in just 45 days. The idea sounded complex but plausible, and the high returns were irresistible.

Thousands of people flocked to invest their savings. In reality, Ponzi was barely trading any postal coupons. He was simply using the money from new investors to pay off the earlier ones. For a while, it worked beautifully. People who invested got their money back with huge profits, and they told their friends and family to join in. The scheme grew exponentially.

Eventually, the scheme became too big to sustain. Not enough new money was coming in to pay all the investors who wanted to cash out. When a newspaper investigation raised questions about his operation, panic set in. The house of cards tumbled, and millions of dollars were lost. Ponzi's name became forever linked to this particular brand of financial fraud.