President Donald Trump loves to keep people guessing about his next policy moves, a reality TV, cliffhanger governing style that is helping “events” wagering companies, including some backed by one of his sons. Traders flocked to Polymarket this month to bet on whether Trump really was going bomb Iran back to the Stone Age or just call a ceasefire. The value of the company, in which Donald Trump Jr. has a stake, has increased tenfold from the summer, according to research firm PitchBook, and is now nearly $10 billion. A spokesman for Trump Jr. dismissed any concerns about him profiting off the business as left wing propaganda.