You logic doesn't make sense to me.
Assuming their insider information really helps them to gain an effective advantage and thus continuously make them money then you should assume they want to keep this operation running (as is) as long as possible. Why would you assume they are and will continue to constantly loosing money while trying to exploit their presumed (but technically proven to be ineffective) advantage (assuming they make more losses than profits) or choose to steal everything (thus becoming actual criminals) rather than continuing an already profitable operation (without effective legal problems)?

I think the Gox insider trading (Markus/Willy) was presumed to be a last (failed) attempt to recover funds which had been lost already (due to an earlier hack). But the new theories tend to think otherwise (those bots didn't belong to Karpeles but a [inside or outside] hacker who used them to steal the funds).