Gold wasn't chosen at random.
Out of 118 elements on the periodic table, humanity converged on one. Gold doesn't corrode — pull a coin from a 400-year-old shipwreck and it looks the same. It's divisible without losing purity. It's malleable enough that one ounce can be hammered into a hundred square feet of sheet, or drawn into wire thinner than a human hair.
And it's brutally scarce. Can't be synthesized. Can't be printed. Every ounce ever mined in human history would fit inside three and a half Olympic swimming pools. Those physical properties are why it became money — not the other way around.