NEW: Tether has quietly built the largest known private gold hoard in the world outside of nation states. The company now holds over 140 tons of gold, valued at roughly $23 billion, stored in a high security, self managed vault in Switzerland that was repurposed from a Cold War era nuclear bunker. According to Bloomberg, Tether accelerated its gold purchases in late 2025 and early 2026, buying 1 to 2 tons per week, a pace that outstripped many central banks.