Speculation has been growing over the summer that Pink Floyd, one of the bestselling bands in rock history, is set to sell its lucrative music catalog for more than $600 million. It would be a record-setting amount for any music artist, topping the estimated $500 million Bruce Springsteen received in December and the reported $300 million Bob Dylan received in late 2020 for the sale of ownership of their songs and music publishing rights. Bloomberg News, the Financial Times, Billboard and other major outlets have reported that Pink Floyd will be the next act to rake in a fortune by selling its…