Once upon a time in America, baseball cards weren’t collectibles or “investments.” AdvertisementA pocket full of baseball cards was a boy’s fortune. Topps, whether they realized it or not, was in the business of printing the unofficial currency of many a boy’s childhood. Topps had been king of the baseball card world since the early 1950s, when it muscled Bowman out. Somewhere in Boston, in an air-conditioned corporate office, a former schoolyard baseball card shark is explaining “customer engagement” to DraftKings investors.