I agree in the fact that gold does indeed have real usage value in the world, but no its not the best electrical conductor, both silver and copper is better conductors, and the best is actually structured graphite. Why they use gold in electronics is due to it being a pure and stable metal not easily effected by corrotion. It makes for very good contact surfaces and can sustain harsh environments like outer space. So its used as an outer layer on conecting points and surface coating. :)