-Small investment large gains: Any investment scheme that asks you for money and in exchange for unrealistic profit expectations or massive assured cashouts within little period with little to no risk is probably a fraud. We should always be wary of any information offering high and unrealistic profits with no effort or hard work involved since fraudsters are going to any extent to make absurd promises merely to get naïve individuals in. If anything sounds too appealing to be true, then it's certainly not true and is most likely a scam.
This is a very obvious way to spot scams and it's what most Ponzi schemes use. Any investment that tells you you will get more than 25% ROI within an unrealistic period of time has scam written all over it. A lot of Ponzi schemes even offer 50-100% ROI within a month or two. You may be paid your profit at the end of the month but that business model is highly unsustainable and everybody should know this. Sooner or later that business would crumbles or the scammers will scamper away when they've got the right amount of money they want.