Gold has two important features.
first, beauty of it is corrosion resistant. Ideal for jewelry, coins, and ornamental purposes
It not polishing, it's also a pretty all the time.
such as, Macedonian coin still beautiful all the time 23 centuries ago.
Second, Is applied in industry and Science in the past several years. Now, Gold is used to protect for the heat in astronauts’ suits.
So it is not only beautiful but also useful.