one day we will reach out to asteroids in our solar system, and find that they are littered with gold. The gold on the surface of earth today was from asteroids. We just so happen to be near where a two large neutrino stars collided, which is one of the only ways to get enough energy to form gold. There's almost an infinite amount just in our solar system, and space mining would completely eliminate it's intrinsic value. It's a good conductor though, for the computers mining bitcoin