"...can we do that?"
No. Beaver pelts worked fine as money. Goodwill does too, and personally I'd hate to live in a world without it.
"We use specie because we have no trust"
No. Money has nothing to do with trust. There's a variety of scams that have been applied to money because traitorous maggots employ theft by fraud to get it, but that's not anything money has to feature. Specie, for example, doesn't natively facilitate inflation, fractional reserve banking, usury, or any of the other scams the rich get richer by.
"We now have bitcoin."
At the pleasure of the owners of the physical network hardware we use to transact in BTC. At their whim and sole option they can choose to require any given BTC holder to comply with any restriction they want in order to transact at any minute. They can do that. They don't because the minute they start the price of BTC will crash to what their honor and goodwill is worth, which isn't a damn. It's a trap, and the more value you think you have in BTC, the more you can be extorted to be able to spend it.
"People will demand..."
Decentralized means of production are today developing to enable every individual to themselves manufacture whatever product they want at the level of quality they want it. Remaining dependent on centralized production is remaining subject to the centralized producers, which is an existential threat. Back in the 1980s Ethiopia suffered a civil war that lasted for decades, until Eritrea emerged, and starvation was used as a weapon that whole time. Do not think that rich bastards won't starve you into compliance, withhold new iPhones, or whatever other blessing of civilization you want in order to render you to submission to whatever they demand of you.
Decentralization of production decentralizes the economy. Rich bastards are dead set against it, because being able to eat, make a phone call, or flip a light switch whenever you want because you provide your own power, phone, and food, means you are unable to be extorted by them withholding supplies. That's the change that is currently in progress and the real change in money will be in it's distribution according the merit of the productive, rather than by parasitizing pools of laborers and consumers as has historically produced rich bastards.
Thanks!
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Yes, social currency can replace the EAT (energy accounting tokens).
Social Currency (article): https://peakd.com/informationwar/@amaterasusolar/social-currency