This could be an interesting game and attract more participants if it were branded differently. You're asking people to steal the coins, but many probably feel bad about the word 'stealing' and doing anything related to it. Also, it's not great that you're a newbie, so there isn't a good reason to trust you that this thing is legit, especially after and capitalized I controversy. But you could make it a challenge with a 0.002 reward, write some conditions and the description of it as a challenge, not as a post asking people to steal the coins. If there were any way to confirm that the private key thing is legit and solvable (by referring to a trusted forum member to confirm this, for instance), it could make the whole thing pretty popular here on Bitcointalk.