Gold?
The technology behind crypto is resolving this exact "flaw" in fiat currency, and sounds like to me you've just described a major advantage of crypto over any government backed currency?
Very few currencies in the world is gold backed. You probably know it already. So it is not Gold
You asked a question, the answer of which is sought by Economists with PhD spending their entire career. They often quite not agree with each other, and sometimes even get it wrong. ?
This is a common man’s common sense summary but to elaborate further we need a face to face session with a few scotches to loosen the tongue ?
1. The intrinsic value of a sovereign currency is a function of the economic activity of the country. GDP is an okay measure
2. The amount of currency is controlled by a Government (Or Governments) through the monetary Policy
3. Inflation, deflation, and other similar economic events are a direct response of general population as a body to the monetary policies
4. As an example of #3 above - Inflation is caused when there is an imbalance of floating cash with the economic activity- Inflation happens till the balance is corrected automatically
5. #1 - #4 is a perfect example of a “Closed” economy
6. Economy in the modern world however is not really closed
7. In an open economy the value of a sovereign currency is further set against each other in the Forex market.
8. Further to #8 above - Any monetary policy of a currency will impact how that currency trades in the Global Forex market
9. Further to #7 above - Balance of Payment is an OK indicator on a currency’s behavior in the Forex market. However it is not a perfect indicator as Sovereign Governments respond to each other’s monetary policy with complimentary policy
10. Whole thing just works - Although some economists would argue it is perfect and others would argue in a sitting time bomb
Now - A currency not backed by a sovereign government will perform extremely poorly against all economic indicators I have given above. It also explains why it does not have any intrinsic value, as it is not backed by any economic activity.