it is also possible that he lost them or forget password or destroyed those bitcoins
i don't think he own that much bitcoins right now, and no one has wallet address of satoshi that are supposed to holding thousands of BTC
AFAIK he created a new address for each of the block rewards he got.
So I don't think it's possible to find a single address with all that coins.
If it was it would have appeared in the Bitcoin Top 10 rich list by now.