Check out https://medium.com/@grantm/obtaining-instant-breach-transpar... for some more info about how this might be possible.
It's still unclaimed I believe: http://ownme.ipredator.se
"This challenge started in February 2015, and will run until the above address no longer contains the 10 bitcoins it started with, or until we lose interest. In 2018 we will likely reuse most bitcoins for other projects."
So I'm not sure what happened frankly.
> PSA: the bitcoin piñata will be reduced by a large amount, the owner who lend the 10 btc wants to spent 9 on useful projects
There’s a reason companies use bug bounty platforms instead of just having a bunch of bitcoins lying around.