Nobody will know as the decision is left for him. However, I pray he should not sell as this will pull the price down. Satoshi is the trustee of the cryptocurrencies and I doubt if he has greed in him.
However it's unlikely that he is going to move the coins and the reason is simple he probably knows that any movement in those coins will create concerns about the future of bitcoin, since it would seem as if he's trying to cash out and if the developer is trying to cash out.