I know is a ponzi... but some people has made money with hashocean and posted proof. The question is when to cash out and leave before the collapse happens.
What you do is gambling, not investing. If you want to gamble, there are far easier ways to do that without the waiting. But maybe you want to invest in a cloudmining ponzi, because the negative feedback (loss of funds) is delayed some time, during which you can enjoy the illusion of being smarter than all others generating a big surplus...?
Also, I don't understand why you ask if one can trust the company, if you already know it's a ponzi.
If you want to earn more Bitcoin, the easiest way to do it is the same as earning money in real life. Try to do something useful that is paid for.
ya.ya.yo!