"We were broken into and all the money was stolen" is a standard ruse to cover up fraudulent management.
The break-in may be real (by an accomplice), feigned with faked evidence, or totally imaginary.
With bitcoins it is even easier, of course.
That 2bitidiot story may be false in many ways. It may be "merely" false. Or the reality may be much worse, and that story may be an attempt by the Brotherhood of Friends of Shrem to cover it up.
If clients can be made to believe that the coins were stolen, they will be mad at Mark but the incident will die there. There will be no police investigation that could reveal wrongdoings, by Mark or other people.
(After all that happened in the last few years, paranoia should be the norm, shouldn't it?)