The theory of them having lost so many coins on some not registered scam artists, when they were asking an arm and a leg for verification, only a few fools would buy.
Karpeles would have to BEG some of the trusted core devs like gmaxwell and others like antonopoulos to audit all the moves from the supposed cold store wallet to the supposed scam artists that supposedly stole it.
He of course does not do that, but instead represents us with an image of his cat.
He will also have to show us where he channeled all the USD and be audited by trusted members of the community. Again, he should beg for this, but instead he will keep sending us more pics of his cat and say sowwy.
Furthermore, as i explained several times, this prick has created probably WAY more BTC out of thin air than was ever stolen from this exchange supposedly.
This is the ONLY explanation why the price on MtGox went down to 91.5 USD when other exchanges were at 500-650. Only a few insane fools would have sold at this price, certainly not enough to push the price so far down.
He even kept asking for more deposits to fraud people out of there money during that time, as well as getting more real BTC into his hands via the builder tool that allowed people to interchange fake goxBTC for real BTC.
He also created insane amounts of fake USD/IOUs simply by entering a few numbers in the MtGox databse is my believe when looking at the sharp swings.
All this has to be investigated, and see WHERE TO he channeled all the REAL BTC and USD and WHEN EXACTLY he did that and WHO got hold of it. We might be able to figure out SOMETHING even if he used a mixer service to try and conceal the tracks.
Furthermore, if they "just" lost the passwords to the cold storage, and they can without doubt prove that it is THEIR cold storage, i am pretty sure the core devs in agreement with the community could release an updated client which gives them back the control over those coins, or even if i am wrong, this would have been a POSSIBLE way to save them he should be seeking to make it happen.
Of course this prick does not do any of the above, so i am convinced that this theory some put forward is out of the way as well. He does not even attempt to do anything in this regard.
His only thoughts now are how he will be able to get away with some new identity and possibly a surgical face-lift which will change his appearance so no one will recognize him after, along with some diet to lose weight, all sponsored by the powers that want to harm BTC.
A plausible conspiracy theory that is going around in twitter is that Mt.Gox was bought out by some Government agency and make it look like insolvent. This would bring about an outcry for regulation and tighter control. Plausible, but my guess is that he lost the BTC and has no way of getting it back.