I think you (and many others) have this relationship by the wrong end. Things which are valuable are frequently rare/unique, whereas there are many unique/rare

I think you (and many others) have this relationship by the wrong end. Things which are valuable are frequently rare/unique, whereas there are many unique/rare things with no value whatsoever. As others in this thread have implied, the lack of ability to monetize is strongly correlated with a lack of real value.