You're right that among the safest places for your bitcoin is your own wallet. An even safer option is cold storage, using Coinbase, Elliptic etc. But the success of BTCJam and others suggests that individuals are willing to trade-off return for risk. Our model is very different from BTCJam, in that your bitcoin does not get sent to a borrower's private wallet. Bitcoin users by their nature are early adopters and interested in new ventures and new companies. We have users lending through us who have been burned badly before, but still want to try out our new service. We work hard to be as professional as possible and use industry best practices, including margin calls; stop-loss trades and a significant capital buffer. But if you're really worried about 'amateur hour' then that is fair enough - we'll try our best to convince you otherwise, but it's your money.