Wrong 

You can earn yield in gold under a gold standard, though it depends on how the financial system is structured.

1. **Bank Deposits and Loans:** People could deposit gold or currency backed by gold in banks. The banks would lend out that gold at interest and, in turn, pay depositors a portion of the interest earned.
   
2. **Gold-denominated Bonds:** Governments and companies could issue bonds denominated in gold, paying interest to investors who lent them gold.

3. **Gold Leasing:** Large holders of gold, such as central banks, sometimes lent gold to other institutions or countries, earning interest (a practice known as gold leasing).

While gold itself doesn’t generate yield, financial instruments tied to gold, such as loans or bonds, allow yield generation, similar to modern financial systems.

Just substitute gold with bitcoin