So basically a guy used a very old laptop to copy some nasty computer viruses on it and sell that garbage for over million US dollar? And then he called that art?

The only art in this is creating enormous value out of thin air. In my country we call that as "selling fog".

I don't think rich people are stupid. This is either money laundering or returning a favor. If I would make a laptop like that I couldn't sell it for any money.