Scientists have discovered a new allow that is four times stronger than most types of steel. This alloy contains three parts titanium and one part gold. Yes, gold! This material might be used in artificial knee and hip joints.
If this titanium-gold alloy would become widely used in medicine, the demand for gold will increase and so will the price of gold. And this might be good news for space settlements as gold could be obtained from asteroids.
One caveat should be made. Central banks and the IMF still hold large gold reserves and they might decide to sell of their reserves to meet demand.