Yup, all boils down to faith in the currency. For something like the dollar, it’s backed by faith in the US government. For something like Bitcoin, it’s backed by faith in the resilience of the blockchain and the value buyers place on it. Emperor Norton minted his own currency which was accepted all around San Francisco based purely on the fact that people accepted it.
True artificial intelligence is on a planet in the Alpha Centauri system, we just have to go get it!