You can though. People eat gold all the time.
Fine: you can't physiologically sustain yourself on a diet of gold alone. Gold is not a nutritionally complete diet. If all you have to eat is gold, you will soon be dead.
Midas didn't eat gold, and that's all he could have had.
https://en.wikipedia.org/wiki/Midas#Golden_Touch
Fine: you can't physiologically sustain yourself on a diet of gold alone. Gold is not a nutritionally complete diet. If all you have to eat is gold, you will soon be dead.