What?
Are you telling me if Satoshi comes and dumps off exchange 1 million bitcoins would be bullish for the price because lot of people would be buying?
When you sell something in the other side there is a buyer... that's granted. But what matters is sellers to buyers ratio. If you have more sellers price go down...
That's pretty simple, dude...
That would be like the equivalent of the end of Mt Gox. It would remove the Sword of Damocles and confidence would boom. That one million bitcoins would be eaten like chow in a mess hall.
I always wondered why the private keys to those coins weren't destroyed. That would have boosted confidence I imagine