text: Even though driverless cars are possible doesn't make it cheap. It's possible to build a skyscraper out of gold, but it would probably require more then all the money on earth to afford it. Even if you could build this golden skysraper, what would happen after that? Gold is a rather soft material so it would most likely weather away as time wore on and would eventually collapse, even if it wasn't destroyed what would you do with a golden skyscraper that you couldn't do with a normal one? "Radar was a device on a hilltop that cost two hundred million dollars. It wasn't something you could buy at a Radio Shack"