Since Satoshi has tons of coins that have never moved, if they were to move, proving that the coins could be traded, the price will flash crash. I wonder if there's a piece of paper, unencrypted email or shifty brainwallet out there that has the power to destroy Bitcoin, like some kind of forbidden knowledge that a mad necromancer might pursue.

Presumably, with Satoshi's private keys, one could extort the big bag holders in private while simultaneously queuing up short sales before unleashing Bitcoin Armageddon.