Are you pointing towards his *what at this point no one can confirm* 1 million BTC coin stash? I don't really see this as a major problem.

If he ever is going to move one of his earlier coins, or better said, on of his *assumed* earlier coins, there won't be much happening unless there are loads of these coins suddenly waking up after years and years of sleep.

Only in that scenario I believe the market will ever experience the negative impact of someone having access to that many coins. As long as these coins remain untouched, there is nothing to be afraid of.