Gold actually has some important uses.  It's why the James Webb Space Telescope is coated with it.  It's why you can find it in electronics.,(reply>), @Brain Mind Gold Is not rare Lol.. Theres enough Gold in the world to cover the entire earth in feets..,(reply>), @Merxellus No, gold is not the least valuable material, certainly not for a technologically advanced civilization that has important uses for gold and for a material which is sufficiently rare.  Precious metals have important uses in technology and are large elements, therefore relatively difficult to find.,(reply>), @Brain Mind "LESS"..we r talkin in cosmic scale. Out of all the materials,Gold is at the bottom.,(reply>), @Merxellus Gold is not a good building material, but it has properties that make it valuable for certain applications.  The demand is less, but so is the supply.  Its IR reflectivity is second to none.  It also has exceptional electrical conductivity and doesn't tarnish.,(reply>), Think for a broader scale..  Compare to iron aluminium etc.  Gold doesnt do much.  We use Other metals everysingle day in every construction.  He meant a relative term