It holds objective value whether humans decide it has value to them or not. It’s useful for certain things and would be useful for other intelligent, technological creatures besides humans because those uses are objective – its malleability, resistance to rusting and conductivity make it valuable outside of the perceived human experience.

Land is probably a better measure of objective, external value though. Let’s go with land – the real rich people are the landowners, as they’re the ones who can call the shots by deciding whether you can even exist in certain areas or not.