Hyip and ponzi sites are mostly scam right now.. I totally agree with you that gambling and trading sites are the most legit sites to invest but gambling is not a very good investment for it has house edge and these gambling sites were made to make the owner rich. It's programmed to take away our money. Even if you have a very good strategy in the long run u can never win against the owner of the gambling site. So try to have self discipline and control when engaging in gambling sites..

Trading coins is better than gambling. In trading you can choose when to buy low and sell high but you need a lot of patience and knowledge about the coin your currently investing.

Good luck in your investment ventures and have a good day everyone!