Moral decency is the last thing this trustee will think of when paying off the money they ran off from their investors. He needed to pay them off every month, and exchanges is what this dude saw fit to do the job, even if it crashes the market at his own will. Clearly he was only following orders just to be done with the job, because if he isn't, then he might have accepted the offer of Kraken's CEO to facilitate an auction for the coins. Nevertheless, the effects are already in place for bitcoin and its markets. We can only hope that it (the sold coins) would be absorbed by the demand.