Idea is pretty simple. I give you bitcoins. You invest/day trade with them. You take 25% of the profit/loss. Would anyone do this? it's a good way day traders can make some money.
Sounds like a good way to get scammed. Whats to stop scammers from trading with your bitcoins, then telling you they lost money. Or whats to stop them from sharing the profits, and then disappearing when there are losses to share?