The number can only go down, never up, so you ask for all that you can.
It does have -some- sense if you think about it: this is a young kid with a whole career ahead of him. Because of this accusation, his career is pretty much over. Since he could have been one of the best (as demonstrated by beating magnus) he would have made $100m over a lifetime. Based This is probably the order of magnitude that hikaru and magnus will make in their careers. Or some loose logic like that