Just some gold being absorbed by mercury

You can sell it for all of the money

Your PC has gold in it. Current travels through gold faster than through copper.

It's mainly because gold is easier to work with than copper, not because it's slightly more conductive

It also cannot tarnish, so it lasts a hell of a lot longer. It's also used in some arthritis and cancer treatments. Also, it's probably the most important element used when constructing a satellite since it's so reliable (wouldn't be feasible to provide maintenance for every sat in orbit, or every rover we send out). It's even used as a lubricant. It's used in glass to reflect radiation, keeping buildings cooler easier.
It's a VERY useful metal.