I just started a new blog describing my experiences with BitConnect, Control Finance and USI Tech. They all have advantages and disadvantages. As they are all high-yield investments, many assume they are scams. I have yet to see proof that they are scams. I figured I would invest modestly and memorialize my experience. I'm prepared to lose though.
The only person that can tell you to invest or not is you. Do not take someone else's word without doing your own research first.
I have had nothing but positive things to say about all three of these programs thus far. Check out my blog article for more info. :)