> you refuse to reveal what precisely
> you knew and how you came to know it
> Mt. Gox said lots of things, including
> some things which were, ahem, very effing
> improbable and yet which alleged very
> specific facts about people outside of the
> building
The simplest answer is "nothing," but we're meant to believe otherwise.
We could go through each item on that list and try to reverse engineer which entity he wrote and what he asked, but this indicates he isn't being straight with us. That's fine; it's his right. But it's a little odd. If someone performed some badass investigative journalism that could've blown the whistle on the Gox case long before anyone knew about it, who wouldn't want to brag about it after the fact? Especially when it'd be so easy to illustrate the steps taken.
We're talking basic questions like "What did you write?" and "What did they say?" But we're meant to guess.
If a big-name bank operated a bitcoin exchange that was repeatedly hacked, came up with a mountain of excuses about why people can't withdraw, made nonsensical claims about doing business (e.g. 10 wires/day, not trading in the USA etc.), no-one would use them.
(edit: in The Real World, I imagine they'd have been shut down in seconds flat thanks to regulations, but for the sake of convenience let's pretend regulations don't exist)
Instead, we had a plucky new underdog that people wanted to believe was creating history.
Bitstamp, Bitfinex, Cryptsy, more I've forgotten, were the competitors really more reliable?
I've been in a position to see some absolutely insane stuff happen on exchanges [most of it gets quietly buried), and I really don't think MtGox was anything remarkably different.
what if the answer you're looking for is, "he called up someone at mizuho, went and got a beer, and the guy let it slip that that gox is broke."
then what? hmm? haha what are you going to do about that? that's how the vast majority of insider information (note i didn't say insider trading) is passed. are you going to replicate that the next time around on a specific asset that's about to crash, or a specific company that's going to go insolvent? good luck, friend. this is how the world works; you clearly were not in on it, none of us were, that's why a bunch of people were left holding their dicks in one hand and an empty wallet in the other (i don't deal in bitcoin because i'm too dumb to comprehend it, but i saw the carnage online).
at the end of the day he believed something differently than most. it's not any more complicated than that. that's how people generally make a bunch of money, or in this case, prevent from losing a bunch of money.
also, he lived or lives in japan and speaks japanese, so that's probably going to be the major hurdle for you to grasp his process - he has a lot more day to day context of how all this stuff works in that country. unless of course, you live there too, in which case, that's even worse for you. sorry pal.
Then... That's the answer. Obviously. The point is, he's given no answer yet made grandiose claims.
I suppose it's lucky he doesn't feel like telling tall tales. He could cook up something convincing.