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I'd argue that seashells and leaves are close enough to fiat as makes no difference (from a functional perspective, at least), and that with barter, you're only a step away from the same.
I suppose you could argue for one of them fangled cryptocurrencies, but then you're looking at pretty much the same thing, just without any sort of regulation (until a single entity ends ups controlling the lot to their own benefit).
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I suppose you could argue for one of them fangled cryptocurrencies, but then you're looking at pretty much the same thing, just without any sort of regulation (until a single entity ends ups controlling the lot to their own benefit).
Gonna go out on a limb here and say that you don't fully understand crypto currency.
Fiat currencies always are. It's a house of cards propped up by optimism and collective self-delusion. Seems to work though, so fuck it. Unless you're advocating a return to the gold-standard, or making seashells or (DNA hat-tip) leaves legal tender there are remarkably few alternative workable options. Other than barter, which is kinda clunky on any sensible scale.