Part 1: There are various types of investors in the market. Some investors are banks, personal investors, corporate investors, peer-to-peer lenders, angel investors and the list goes on. Part 2: A pyramid scheme is a business model that recruits members via a promise of payments or services for enrolling others into the scheme, rather than supplying investments or sale of products. I personally have never been part of a pyramid scheme. I have witnessed pyramid schemes through friends on social media. That is a perfect source to recruit new investors and trick them into the scheme itself. Pyramid schemes can be extremely sketchy especially if you have a friend you trust that is also tricked into it. The fact that it gains members through a promise of payments and or services for enrolling others into the scheme, is just one main reason why it’s easy to fall for. Being told your income is based mainly on the number of people you recruit, and the money those new recruits pay to join the company makes most people think they can make money easily. Knowing enough people and advertising whatever it is the scheme promises and not on the sales of products to consumers is a lazy way that makes people think they can make a lot of easy money fast. Tip-offs to this kind of fraud include selling as a passive income or an easy money opportunity, high upfront fees, or even a promise of unrealistic returns in a short amount of time. Pyramid schemes are unsustainable because they rely on the ability to recruit more investors and the only people really making money are the ones at the top of the pyramid. The products themselves do not sell well and finding more recruits is the only way I see they can make profit. The victims end up being all the “investors” or participants. DIAGRAM* Part 3: According to the website, 2009 60 Minutes CBS broadcast on the Madoff affair, Harry Markopolos was the man who discovered the Madoff fraud. He found out because he was a competitor for Madoff from 2000-2004. He noticed Madoff’s performance line caught his attention because it only went up. Madoff’s victims included charitable organizations, Hollywood royalty, country clubs, and so many more victims.