The obvious answer.

In his book titled “Everything Is Obvious. Once You Know the Answer”, Duncan Watts posits that what we value as worthwhile is often determined by chance. He cites the case of the famous painting Mona Lisa that is now considered among the world’s masterpieces, and hangs in a special place in the Musée du Louvre in Paris. For centuries, the Mona Lisa was of no particular interest, and was thought of as no more than an obscure painting by a second-rate artist. It was not until it was stolen from the Louvre in 1911 that attention was drawn to this work of art. Once it was seen to be valuable enough to be stolen, its popularity soared to its revered position today.