Forget breaking glass. In case of an emergency, billionaires will be beelining for their backup country. Ultrawealthy Americans are increasingly securing a plan B (or C or D) by obtaining alternate citizenships and residence programs, be it as a hedge against another pandemic, a nuclear war, or geopolitical upheaval. Think of it as very expensive insurance or portfolio diversification. Peter Thiel is the latest example. The billionaire PayPal and Palantir cofounder temporarily relocated to