HYIP is something that you think and feels that is too good to be true. Most of these scam sites and scammers will tell you that you can yield a very big amount of gains with even little investment in just a short period of time. Come to think of it, where in the world do they get the money or invested that turn your little capital to high yield earnings? It is not making sense at all because if with that little amount they can make it big, they might just as well going to do it and not offer it to other people.
Let me answer that question for you and for the newbies that might be reading in here. HYIP sites are ponzi sites. This means that they are paying you out by using the funds of the people that just recently joined the network. As long as there are new people coming in, there will be a payout. Once the hype has died and no more are coming, then they are closing down their website and run away with your funds. This is why there are still people risking their money on HYIPs. They are going to find a new HYIP site and then promote it as much as they can. It's a gamble.
It doesn't make sense if there's an actual method with them that makes them earn that much money and so they have made explanations for that. There are new ones today that claim that they are a group of foreign exchange (Forex) traders. They trade and trade and trade and they need the funds of other people so they can increase their earnings. They are going to offer you 20% gains for a couple of days. They say they made above that 20% gain will be theirs. But still, come to think of it, why not roll their funds over and over, right?