Gesell's theory has been around for generations.
In reality economics it seems to fail. Mostly.
But why not keep trying? Crypto is a continuous testbed of concepts.
I'd rather see a coin that gradually deflates (deletes) none moving coinage. Also a 0.001% transaction fee. Thus you get money that evaporates if not used, and the supply is mostly what is recently mined. Would work well for one of these 2.0 DEX exchanges aka layered platforms. The Freigeld is the main chain reward and needed to buy tokens (base pair currency). Deflationary % inverse relation to Difficulty %. Likely would need a fiat tokens (as secondary base pair currency) ... so the DEX platform has 2 different markets to price assets/tokens. One spiky the other pegged and smooth.
Freigeld has several special properties:
It is maintained by a monetary authority to be spending-power stable (no inflation or deflation) by means of printing more money or withdrawing money from circulation.
It is cash flow safe (a scheme is put in place to ensure that the money is returned into the cash flow – for example, by demurrage – requiring stamps to be purchased and periodically attached to the money to keep it valid).
It is convertible into other currencies.
It is localized to a certain area (it is a local currency).
the extant 2.0 DEX exchanges; basically have the same properties.
NXT money supply is no inflation no deflation?
Writing in a stamp tax rule into the system is likely going to be tested by at least one DEX exchange.
That will force perpetual sell pressure. And savers will just convert into other currencies, but buyers will need the Freigeld.
A bear Freigeld market, lowers difficulty (because low prices low hash) and the tax% goes up, currency not in motion is taxed, thus currency supply shrinks, triggers market to bullish, raises difficulty (because high prices high hash), high difficulty means lower tax%, Freigeld supply inflates, Freigeld market goes bearish, full circle, loop, repeat.