Cryptocurrency Carl is a wealthy NFT broker whom Brian aspires to become richer than in "A Bottle Episode".
During their stay in Nantucket, Massachusetts, after he and Stewie decide to splurge on saltwater taffy and sell it back home in Quahog, Brian suggests that they might make more money than Carl. In the ensuing cutaway gag, Carl is shown purchasing a mansion, demanding that everything be painted matte black, only to remain uncertain as to whether or not he has the money to pay for it all.