Currencies have a perceptive value. No tangible meaning. If the government suddenly want to overturn a currency you lose. Gold, silver etc have tangible real value. The government can ban every currency but always your gold and jewels will have value. Like in Cyprus where the banks took most of peoples money from the banks. Just like that you lose your money and they gave crappy shares in the bank of Cyprus which are even more crappy. But those who had tangible assets wouldn’t have been affected. It’s a shame that the world is ran on perceptive value of paper and polymer.