Bitcoin creator supposedly has 980 000 BTC. But they have not moved or been used once in many years, fuelling speculation that they might be lost.
Anyway, no sane investor would dump all his coins at once on the market.
There are many possibilities.
1. Satoshi might be dead.
2. He don't have the private key for any of these wallets.
3. He might have send the coins to someone else, who might have lost the private key.