He may be dead, but he may be still alive. If he is alive and kicking, people would expect him to spend at least part of his huge stash of bitcoins he accumulated during the early phases of Bitcoin existence. Since he doesn't touch these bitcoins, and the odds of him losing the keys are small to negligible, people start speculating that he has already kicked the bucket. As to me, that's why people say what they say about Satoshi. But he may just as well be rotting in one of the secret CIA prisons, and Trump can potentially save him if he finds out...
What Hillary would do if she found out should be absolutely obvious