Monetary value reflects demand, but demand does not always reflect utility or goodness. There is a demand for atrocity.

The construction “NFTs are highly priced, thus they are desired, thus they are good” is full of holes. If I have a phobia of spiders, and a corresponding desire to eradicate them, does it follow that eradicating spiders is good? If I got my wish, I and the rest of the world would be worse off for it, but my desire exists none the less.