Hold on to your hats. There may be another Las Vegas roller coaster headed for the Strip, offering another attraction for risk-loving thrill seekers. Amusement ride company, U.S. Thrill Rides, plans to spend $100 million on building what they call a “Polercoaster” near the Tropicana Hotel on the Strip. The 650-foot tall Las Vegas roller coaster would be the tallest in the world and would be a combination of a ride and an observation tower with stunning views of Las Vegas. In April, U.S. Thrill Rides submitted plans to the Federal Aviation Administration to build the tower-like coaster. A Polercoaster…