Fiat money is a 50 year experiment that will fail.
Definitely not trying or wanting to be abrasive - but any chance you could provide evidence or data displaying the accuracy of this point of view?
All economic goods experience production pressures when their replacement costs are lower than their market prices. When the marginal production costs of a money is effectively 0 and the market price for new money is >0 (Seigniorage), the long term supply will tend towards infinity. Hence money systems have developed with competitive Seigniorage; e.g. producing marginally more money is in direct competition acquiring the money from a private owner (bitcoin).
If all national currency is doomed to fail what makes you think something like blockchain projects are built to stand the test of time?