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.
Even if its sold someone else will buy it. You shouldn't fear the free market, embrace it and learn to use it to your advantage. Cheap bitcoins? Buy while you can...
Or perhaps he lost his priv keys anyway. Can you track how much of the 17.5 million bitcoins are "moving"? Some will never move again from lost keys. Forking over something like this is unacceptable.
You have a socialist mind, and want "intervention", but there is no State or institution so you are appealing the Bitcoin developers AND the community that keep the nodes and mining. But they won't accept such a thing.
Transitioning from a culture where you are used to a State controlling, to one where there is no one who can manipulate the money no matter what, is part of the maturity. It isn't even Bitcoin's maturity, but the people that think they understand it.
Accept that there is that million out there, and that it could be moved at any moment, or never. Its part of bitcoin's value.
Oh; Satoshi sold his million. Good for him, he deserves it. Or let him hold them for another decade, when the price gains an extra zero or so...