If Mark was knowingly running a fractional reserve since 2011, then I think this is clear-cut fraud with jail time involved. If Mark was not aware of the theft, then it is just incompetence/negligence. He would have an incentive to inject as much confusion as possible.
+1 - this Karp is bozo, but is still better than 90% of those Wall Street types...
Running stolen coins through an exchange for fiat would be suicidal, thief would get busted quickly.
So if a "cracker" really has 850K bitcoins (highly unlikely really), the question is "WHAT WILL HE SPEND IT ON"?
Answer: a bunch of stuff from every site on the net that accepts bitcoin. I wouldn't be surprised at all to see "people" overstocking from overstock.com... actually good for the bitcoin economy in a way...