I disagree. Satoshi would reveal himself in order to gain prestige and earn money speaking on the topic of cryptocurrency. News media alone would pay to book him on shows and he'd get a book deal, maybe a motion picture deal.
I don't remember a single thing about him/her that indicated giving a tinker's damn about prestige or publicity. And Satoshi certainly doesn't need the money of a motion picture or book deal. I just don't buy it.
That being said, it seems unlikely that anyone who still has the keys would leave that much money sitting there. There is this weird idea that Satoshi must be altruistic to just leave that money there for the benefit of Bitcoin is silly. He could spend that money supporting Bitcoin endeavors and showing the good that Bitcoin can do, by donating to charity, for instance.
it is my belief, he probably lost the keys and can't get at the money.
Okay, big nope. Satoshi absolutely never lost a key. S/He kept correspondence keys I'd deleted a whole year previously and was amazed that anyone would EVER lose keys. I remember him/her being puzzled about the idea that people might not get further payments to old txouts because they'd delete or lose keys after spending txOuts. Exact words: "why would anyone *ever* delete a key?"
As for being altruistic, I dunno. I think s/he just doesn't give a crap about having a lot of money. I know for certain that s/he didn't do this for the purpose of getting wealth for him/herself.
Those million coins is the reason people want to know who Satoshi is, and if he still has the keys. Because the person that does can sink the market by mass dumping of coins.
No, not any more. The second halving is coming up, and at this point 15 million coins are mined already. Satoshi's coins are less than 10% of the coins out there. It would affect the market, sure, but it wouldn't kill it. And anyway, why would the same person go to great effort to create bitcoin, and then destroy it? That makes a lot of nonsense. If s/he does start spending coins, it won't be a massive dump.