Comment Compared to what? (Score 1) 130
If you're going to criticize a thing, organization, or person, it's helpful to be able to answer the question: Compared to what?
National currencies can also be used for ransoms, bribes, etc. In some circumstances one is better than the other for a criminal's purpose. The same is true for beneficial uses of currency.
National currencies can be devalued via inflation, with devastating effect on the populace -- modest with moderate inflation, severe with hyperinflation. In a country where, on payday, you are paid in cash and it's by the pound, there may be political instability and an opportunity for demagoguery, or worse. See the rise in Germany of one A. Hitler, and others in perhaps more than one Third World country.
National currencies also require resources to create them, including ones implicated in global warming. Producing the paper or polymer. Producing the ink. Putting the ink and holograms and other things on or in that paper or polymer. Cutting that paper or polymer into convenient-sized rectangles. Shipping those rectangles from the printers to the central banks and then to other banks in the banking system. Withdrawing those rectangles from banks and other financial institutions. Depositing those rectangles into accounts at banks and other financial institutions. Getting damaged and "recalled" rectangles out of circulation and replaced by fresh ones.
National currencies also occur in forms other than rectangular money. There's also coins, which have similar considerations in their creation, distribution, and replacement.
National currencies are mostly just accounting, though. In computers. Computers that use electricity. Computers have to keep track of electronic national money as it is created and destroyed, as it flows through financial institutions -- traditional ones like banks and credit unions, and newer ones like credit cards and PayPal and gift cards -- and that also takes electricity.
So, before you go branding cryptocurrencies as eeeevil, you might want to ask yourself: In comparison to what?