It's known that he may have a million
BTC in his possession. The bitcoin network clearly showed that if satoshi makes transactions the price drops. Even if he is not satoshi, big transactions from old generated blocks is creating a trouble in the market.
If satoshi sells 500
BTC price may drop 2-3k dollars. So he is not that rich, isn't he?

"Trouble in the market"?So a less than 10% Bitcoin price drop is a "trouble in the market"?Are you serious,OP?
The guy that moved those 2009 bitcoins isn't Satoshi.
Satoshi owns around 1M Bitcoins.Even if the Bitcoin price drops 2-3K dollars,he is still a multimillionaire.
What do you mean by "isn't that rich"?He isn't selling or using his BTC,which means that he's not rich at all.
We don't know if he is alive,discussing his BTC wealth(that he never used) is pointless.