National currencies must also be exchanged for other currency when you want to spend in some other currency regime. I can't spend my SEK elsewhere without excha

National currencies must also be exchanged for other currency when you want to spend in some other currency regime. I can't spend my SEK elsewhere without exchanging, just like with BTC and ETH. Even so, an asset can be valuable even if it's not used as daily currency. You can't buy a Coke with gold.