A billion dollars of gold fits in a suitcase

Gold is one of the heaviest substances on Earth, nearly twenty times denser than water. This extreme weight means that a staggering amount of value can be tucked into a tiny space. If you filled a standard carry-on suitcase with solid gold bars, you would be holding roughly one billion dollars. This physical reality is precisely why the People's Bank of China has spent seventeen consecutive months aggressively stockpiling the metal.