Not really
There are some industrial applications, but they are minor.
Yeah, it'd probably crash the gold price. World production of gold has been declining for years now, which is partially responsible for the increasing price. It, like so many other things, is getting harder and harder to find in economic deposits. But it is a strange market: not really a commodity and no longer used as money (except for the Central Banks and a small number of investors).
Gold would likely be a by-product of the mining of more useful metals from asteroids.