I doubt the real Satoshi would want to harm bitcoin. Its his creation his legacy. The genesis block had a message about banks doing QE I think. Why would he seek to destroy his creation ?
also he is not the only one with a big amount of coins, so he is not the only threat out there, yet they talk only about him dumping
at this point even 200k coins would be absorbed easily by the market, none can kill bitcoin by simply dumping anymore