Not being able to move on when the possibility of half a billion dollars of your money is out there somewhere and there could be something you could do to get that money is understandable. This dude thinks, if he could work hard enough, and convince the right people, there is a possible way of him to retrieve this money back somehow. However, there is a possibility of this money being completely gone, and there is a HUGE possibility that not the chances are high. Even if the council allows him, and the team does all the work to take out everything, he will probably not find it anymore. I feel like him giving up would be the best thing for his mental, but I fear giving up is not something his mind can do when the discussion is about half a billion dollars.