What will 10,000 bitcoins do to the price in a day or future prediction? It is equal to 30% daily trading amounts, and whenLUNA was sold 50,000 bitcoins, all that panic occurred. not 10K
Mt.Gox case and all its consequences are in court, and therefore the sequence of the process will be slow, and we may need additional years to solve this problem.
Even if this was 100K bitcoin, the market is not going to respond in a negative way because these are stolen funds and they can't easily be sold. The coins are flagged and whereever they get sent they will most likely get frozen.
Many exchanges have blacklists and if there are tainted coins depositted into it then they are frozen. Even if they don't have this address blacklisted, many people who track the coins onchain will email the exchange and tell them to do so. They will have no choice, they won't allow them to be transacted with at the exchange.
So what the OP is worried about is that even this move has happened many times which we have seen as well as Mt.gox moving 10k bitcoins for me indeed it will not affect the market and will not just fall because the market will remain in the same situation.
Obviously I can assure you that if it was stolen funds transferred by Mt.gox, the funds would have been frozen on the stock exchange, some people would have reported that if it was true that the funds had been moved for sale, so I was not surprised and not the least bit worried because the bitcoin market reaction won't be that negative.