It's not a secret Satoshi Nakamoto has more than 1 million of Bitcoins in his wallet, right?
If he suddenly wants to sell all his Bitcoins, could it cause a chaos in Bitcoin market making the price fall? Or is this amount too insignificant to cause any mess?
I think the more interesting scenario (but still farfetched) is if/when there is a fork, Satoshi could decide to dump on the chain he doesn't like. So say there was a core/BU fork and he wanted core to be the dominant chain, he could dump all his BU coins and pump core btc with the profit.