Individual Needs And Wants Is The True Determinant Of Value; Has This Been Proven Otherwise?

Value isn't all about Democracy and shouldn't always be determined by the Stances of the majority and sometimes there is always the mistake of often thinking that the most costliest of things would generally become valuable to everybody but the truth is that sometimes people's need and want makes value a variable and not something fixed.
for example a dying person would obviously need life and not money meanwhile a healthy person would need money and not life because they have it and that is why sometimes commodities isn't always fixed as valuable so also let us take the fact that in a post-apocalyptic circumstance money would obviously be useless but in the current economy we find ourselves money is actually valuable and that is why it is often necessary that we understand that even in the most difference of circumstance something worth more or worth it can only be determined by the need or worth at hand.
By all means money would lose value where it can't have purchasing power and that's why we might not have the supreme or ultimate value. What do you think? Can you relate?