In a gold standard society, gold doesn't need to be backed by anything. The same would be true for Bitcoin and Zcash.

In a gold standard society, gold doesn't need to be backed by anything. The same would be true for Bitcoin and Zcash. The US Federal Reserve Notes used to be backed by gold to prevent excessive money creation, gold itself, Bitcoin and ZCash won't need to be backed by anything due to their inherent scarcity.