Oh lets not change the subject. Lets not confuse art and science...
The subject is value, let's not dodge the question. Can you eat the Mona Lisa? Sleep with her?
I just can't think of one invention or drug that came from the Mona Lisa.
Let's break her up, and put the wood she's painted on to something "useful" There's a lot of tooth picks waiting to be made, and dental caries are the most pervasive of human ailments. Think of the teeth we can save!