Another complement to the hard currency (blockchain bitcoin) economy, would be to reinstall
real bills. <- It's a technical but fascinating read about the almost-forgotten aspect of the gold standard, without which the gold standard (of the post-WWI world) had no means to operate, and needed to be replaced with fiat standard in the 1930s.
Another fascinating bit of information, if presented a bit polemically. If I'm properly understanding the concept of "real bills" (not 100% sure - the PDF seems to assume the reader already knows), they seem to fulfill a similar purpose to the Credit Coins in Grignon's
Digital Coin scheme, and by a similar mechanism.
So much eye-opening prior art in this thread.