Several Ponzi schemes have started out with legitimate though niche investments that provided a good rate of return. It just became untenable when too many peo

Several Ponzi schemes have started out with legitimate though niche investments that provided a good rate of return. It just became untenable when too many people poured into the market and the perpetrator didn't have the courage to say no and decided instead to start lying to investors to keep the gravy train flowing.