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.
I mean the fed could just print a bunch of money and crash the price to 0 if they wanted to. they would buy it all up and just sell it at a loss... they don`t care.
Leave satoshi`s coins alone, he or she earned them just like everyone else, sure he/she had mad advantage because of higher rewards but still it is the same with gold, whoever was there first collecting had a bigger advantage because scarcity was less common.
Also in the future it will reveal who satoshi is when they move the coins.