Being fooled into guaranteed daily returns is my biggest mistake and i regret it up till this moment. Its hard to resist such an offer when you're under a lot of financial pressure.
Well since most altcoins or ICO promises great return or guarantee, we cannot really secure our money that a project can promise you a good financial out come. That is why cryptocurrency investment is risky. However, with this risk, there are a lot of projects that really gave other people a massive amount of income. You just need to be careful and invest at the right time and right altcoin.