Money is only one kind of reward. Fame (social capital) is another kind of reward, and in that regard, Terry Tao is far more rewarded than any random Wall Street trader.

Some might argue that in the grand scheme of things, fame is a far greater reward than money. They say that you die twice: the first time is when your body passes away, and the second time is when your legacy passes away. The money earned by that trader will be likely be gone within a couple generations [0], but Terence Tao will be a name remembered by many for centuries if not millennia.

[0] https://money.com/rich-families-lose-wealth/