If you find it you will be able to send it to yourself.
Implies that unless you can get at that address, you haven't found 'em yet.
When they are "found" in the proper sense of the word, you should see them spent on the block explorer into the winner's wallet. This spend will have been done by the winner, not by me.
It's not a riddle in the sense that he wants you to answer-- it's a race to grab the coins.
BUT HOW