"As a thought experiment, imagine there was a base metal as scarce as gold but with the following properties: boring grey in colour, not a good conductor of electricity,not particularly strong, but not ductile or easily malleable either, not useful for any practical or ornamental purpose, and one special, magical property: can be transported over a communications channel. If it somehow acquired any value at all for whatever reason, then anyone wanting to transfer wealth over a long distance could buy some, transmit it, and have the recipient sell it. Maybe it could get an initial value circularly as you’ve suggested, by people foreseeing its potential usefulness for exchange. (I would definitely want some) Maybe collectors, any random reason could spark it."
-satoshi – Read on Path.