50 years ago, world-renowned artist David Hockney sold his painting, “Portrait of an Artist (Pool With Two Figures),” for an inflation-adjusted price of $124,000. In 2018, that same painting re-sold for a record-breaking $90.3 million; unfortunately for Hockney, he did not receive a single penny from the re-sale. When asked about it, Hockney acknowledged that the art industry had already burned him multiple times: just six months after he first sold this same painting in 1972, the buyer flipped it for $344,000.