There is no official proof that says he had 1 million or less amount of coins, he indeed has a huge coin base but the exact figure has never been known, it's always speculated by these people to create panic. It's pertinent to note that irrespective of the figure, Satoshi will never sell his coin he's the father of bitcoins so no need to ever worry about that. These coins will never come into circulation, but many people will try and create fud and panic in the minds of newbies who are not aware of this fact.