Are you sure this is his personal account? I'm not sure.
Read the whole post. No one knows if it is actually Satoshis coin or someone elses. If some says those coins for sure belongs to Satoshi, then that guy is just trying to spread FUDs. Might me one of those early miners, or maybe Satoshi himself, who knows..
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But to express my guess, I think Satoshi would use his Bitcoins for charity at most! (if he still has control over it)
I don't think Satoshi would want to harm his work in the slightest.
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I highly doubt Satoshi would even touch his stash. If he starts moving his coins, people would start panicking.