The question remains: who owns those coins?
Someone had to move them there. Is someone planning to invest with stolen coins?
Probably Mark Karpeles or someone close to him controls all the coins. Since now the wallet is tagged (and probably blocked by all the major exchanges), he can't exchange them for fiat via BTC-E or Bitstamp. So the only option left is now to invest them.

They can just launder those coins in the altcoin market. It is possible that they were stolen from him by someone close to him (if he really doesn't own them).