While an elegant meme format, 2 and 3 are arguably the same if by money supply you mean that which is circulating (otherwise not entirely sure what 3 means), and that doesn't lead to 4, which is also effectively equal to 2 if you fast forward a "few years".
Discussion
3 means that the growth of the money supply matches economic growth.
so if there are more goods and services ("value") the money supply inflates to represent that,
if there is less stuff, the money supply contracts.
the result is the purchasing power of a monetary unit is constant year to year.
not achievable but worth thinking about.
Figured I'd help articulate something, it is not achievable because it requires predicting what people will create using their imaginations and how the world will react to those creations, how they'll find utility and benefit from them in their lives. You can't adjust real time to economic growth because it is an organic, distributed process flowing from the creative mind.
which is why .6 units per block is the galaxy brained take 😂
Well, yeah, the gold thing, where as the purchasing power of money (in this case gold) goes up, production of money also goes up, there's still a latency in that self regulating feedback loop there but it works well.
Continuous linear debasement smooths these problems pretty well too, and trying to build a system that inflates like gold, as a response to increased purchasing power, would require an external price oracle which is a terrible idea for an independent currency, so we have to use something algorithmic and self contained with no self reference. UTXOLive is a pretty cool thing that maybe could do this, but it's certain to be gamed with that much to gain from doing so. And between hard cap, geometric supply growth and linear supply growth, linear wins out, so linear it is.