I do believe you have to have serious mental health issues to remain a billionaire, and I do pity them; in a perfect world the possibility of such wealth disparity wouldn’t exist, and those with those tendencies would get the help they need without being surrounded by yes-men hoping for a sliver of wealth. They are probably incredibly emotionally isolated and lonely, and the pain they cause through hoarding is inexcusable and it would be better for everyone if that wealth was redistributed, including themselves.