Jeff Bezos is reportedly showing a ‘legitimate’ interest in becoming the new owner of the Boston Celtics. The Amazon tycoon, who’s said to be worth around $196billion, is the second-richest person in the world and has been linked with purchasing sports teams in the past. The Celtics are the latest team to be linked to Bezos after Wyc Grousbeck placed the NBA champions up for sale just weeks after they won their 18th championship. Grousbeck and his investment group spent $360million back in 2002 to buy the Celtics from Don Gaston. And they look certain to make a huge return on their investment …