I think that you're the one that's misinformed here.

Go onto Ice Rock Mining's official site and see for yourself - there is an investment calculator on the front page that clearly says "ROI per year: 321%". If that is true, then it's obviously a ponzi scheme since that kind of returns is simply not sustainable. Otherwise, if this is not a guaranteed return and the actual returns you get is much less, isn't this false/misleading advertising? Either way, they are untrustworthy. Plus, in their FAQ where they attempt to explain how they are able to come up with such huge returns, there is no mention of their investments being not guaranteed.

I wouldn't put any money in that myself, if you want to, that's your own money you're risking at a telltale ponzi.