I could be wrong but,
Wouldn't that be more than what the FBI has seized from Silkroad and DPR?
So doesn't that make Mark's wallet the biggest in the world?
That is just an estimation.
Also, many people mined back then and then deleted their wallets because it was worthless at the time.
So it is not certain as to how much coins Satoshi mined.
Also, it is not also certain that Satoshi even kept his wallets.
^^^ that is true, but that is also the main purpose behind Bitcoin.
Protecting your assets by keeping your personal information personal