That is actually possible in cryptoland (I mean 50-55%). You can even make that amount in a day if you're a real good trader and the market shows positivism that day. But, this is the other side: Many of those who'll tell you they'll invest with your money ad give you that huge amount are liars and scammers. They eventually run away with the money. If you're doing it yourself, it is very possible but if they're doing it for you, it's quiwt dangerous/risky!
I understand. Also, why would a company who can generate such returns need smaller investors anyway, they can get a few big funds who would be very happy with such returns and no need to target high volume smaller investors.