Bitcoin should be forked and Satoshi's 1 million Bitcoin destroyed completely, if he really owns that much.
A sudden withdrawal of of 1 million (or large gradual withdrawals) should be regarded as an attack on Bitcoin.
Or it should be frozen for now until developers are sure no one is going to withdraw the whole thing and crash the market.
This is a very bad idea and would destroy the trust in Bitcoin. If you start forking coins out of the network, that would be the beginning of the end. Nobody has the right to decide at Bitcoin which coins are ok and which are not. Once the coins from Satoshi have been foked away, which coins will follow? Yours, mine or which ones? And who will decide that? As you can see, such a move would destroy the credibility of a decentralized currency. Even though Satoshi's coins seem like a threat, they're not.
