I highly doubt Satoshi would even touch his stash. If he starts moving his coins, people would start panicking.
Huge panicking already happened and bitcoin actually dump for some hours , but it's started to recover the dump when the news of Satoshi Nakamoto didn't move Bitcoin started to spread on the internet and many users stopped to sell off their cryptos. But it's a good chance for the traders/institutions to buy bitcoin in deep. 
