The sport’s investors have been driven partly by a desire to get in early. Is there another way? “The viewership side of it — people watching at home — is going to be a challenge,” said Richard Kleiman, a co-owner of a professional pickleball team, the Brooklyn Aces, and the founder of Boardroom, a sports and entertainment company that also invests in emerging sports teams and leagues. dollar terms, an extraordinary rise considering the country’s debt woes, inflation running above 100 percent and stalled growth