Art. Everyone wants it, good or bad. Very few would like to pay for it, even if it alters their perspective, or even the course of their life. The Market is fickle. It rewards those who appeal of the impulsive wants of children and grown children around Christmas or whenever the latest video game console comes out. So for a month or so Furbies, beanie babies, PS450's, or a tickle me Elmo, might cost as much as the last car I bought. On the other hand, Vincent Van Gogh only sold two paintings in his lifetime, while Henry David Thoreau had to pay for some of his own publishing at a loss and died unknown to the broader culture. Edgar Allen Poe, John Keats, and Bach were ignored by the Market of their time though rewarded greatly (after their death) by later markets.
This isn't to say that The Market doesn't at times reward great art in the lifetime of the creator. That obviously happens, Banksy for one. But that doesn't mean that The Market is a good indicator of art with longevity and impact.
So if you'd like to try to catch the Market, find out what it wants and make more of that. But if you'd like to make something that has a chance of lasting and impacting and altering beyond your grave, I'd say make a living off of something other than your most important work.