And since we're already discussing about mysteries here, I wonder: who have read topic 3?

Is this the first bitcointalk.org topic?
What happened with topic 1,2,3 and 4?
1, 2, and 4 exist in the staff forum.
3 was permanently deleted at some point (it must have contained Satoshi's real name and address).
Hopefully Theymos or Cyrus moved the forum software (or at least the database) to more powerful disks at some point in 2017-18 and thoroughly wiped the data on the old disks.
I hope the grin icon made everything clear.

When I first stumbled upon this post by theymos years ago, I thought it was serious, although, of course, you should wonder in disbelief how on earth could Satoshi commit this very poor lapse in judgement. Anyway, at least theymos has already made it clear

:
would you mind telling why you came up with what you said?
It's called a joke.

But, again, it is my hunch that a handful of people have more or less accurate suspicions of who Satoshi might be. But rather than divulging them to the curious public, they instead helped clean Satoshi's tracks for any clues. It is probably, of course, in deference to Satoshi's decision to stay out of the limelight for good.