US billionaires are ramping up their personal and home security like never before. According to Bloomberg, many of the wealthiest people in America are installing bulletproof windows, panic rooms, and other high-tech security features to protect themselves and their families.

Private security firms have seen a huge surge in demand in recent years, but the recent murder of Brian Thompson, CEO of UnitedHealthcare, has made things even worse. This tragic event has sparked a new wave of spen...