CZ stated on social media that it is a common sense. Most people "in the crypto circle" understand this, but most people "outside the crypto circle" may not realize it yet. Tokenizing gold is not "gold on the chain". It is just tokenizing the idea of "you believe that a third party will give you gold at some point in the future" - even if their management has changed by then, maybe decades have passed, or even during wartime. This is actually a kind of "trust me bro" token. This is why no "gold coin" has really become popular.
