It depends on the person. Some people just want $200 dollars so that they could take pictures with it and post it on Facebook. I would hate is such a person suddenly had 20 billion because they are of a frivolous, insecure kind of mindset.
But a person like a Mother Teresa could do wonders for the world with 20 billion dollars.
I perhaps could invest on something that could change the world for the better, but that people don't really care about because it's not a faster processor, of content consumption device.