Thankfully, we didn’t take out that event contract on the launch of the first prediction-market ETFs this week. Prediction markets have surged in popularity, thanks to event contract trading platforms such as Kalshi and Polymarket that allow “yes” or “no” bets on everything from when traffic at the Strait of Hormuz will return to normal to who will win American Idol. While there’s also been a surge of ETFs that offer exposure to potentially comp…