Thanks for clarifying; that helps. The now-bolded does raise the question of which aspect of the money supply should be stable, though (as well as how to create that stability).
If the currency is Fixcoins and you have a fixed number of Fixcoins, the value of a given good is unstable whenever the supply of goods changes. If you seek a fixed price for a given good, the number of Fixcoins would have to be unstable, adjusting to varied supply of goods. What's more important? Is it the number of Fixcoins that should be stable, or the price of goods in terms of Fixcoin?
Anecdotally, people scream about inflation whenever the price of goods changes in terms of the dominant coin. Wouldn't such price changes be a guaranteed fixture (no pun intended) of a system with a fixed number of coins as the currency? Wouldn't most people prefer steady prices of goods? Wouldn't economic decisions be made most neutrally and efficiently under stable prices of goods?
I don't think under either system you will ever achieve a stable price of goods. I don't think any economist would argue that and even under basic scrutiny that idea falls apart. After all, you only have one supply of money and massive amounts of different goods each with their own varying supply. Even if you attempt to control the supply of money for one single good, every other single good out there will have their own independent supply as well that can't be controlled for as a result.
The price of goods should be determined by the market, not the money supply. If supply of a good decreases and demand stays the same, then the price should go up. If the supply of a good increases (maybe as a result of increased production), then the cost of that good should come down. That's basic economic theory. I'm not sure why anyone would think that controlling the money supply is a solution to these natural market forces.
I agree prices are unlikely to be perfectly stable, but I didn't mean that they would be. And when I wrote about a given good, I didn't mean that some regulator would control the whole economy based on one good's price. My phrasing "a given good" implies that there are other goods in the system. I discussed one good in attempt to be clear. Sorry if it didn't work.
We agree that there are many prices in the economy. I'm sure you're aware that in the US, economists attempt to summarize the many prices using measures such as CPI. Conceptually, such a thing as relatively stable prices can be understood, and so can relatively unstable prices. It appears to me that most people prefer relatively stable prices.
If govts affect the size of the money supply, as you already agree that they do, logically their effect could tend toward relatively stable prices or unstable prices in terms of the chosen currency, depending on the govt's actions. You yourself state repeatedly (if I understand you) that overly inflating the money supply causes problems, which implies that a less inflationary policy could be chosen. If you thought a govt could be trusted to maintain a fixed money supply, it sounds like you'd prefer that to the fiat fiasco (as one might call it) that currently dominates the globe. Since govt is untrustworthy in that regard, you propose that Bitcoin will serve as the fixed or stable money supply, correct?
What I'm proposing is that if the money supply really became fixed, "stable" at some consistent size, then prices would vary. You seem to agree with that, specifying that under a fixed money supply, the resulting prices would lead to the best, most undistorted economy.
Prices vary now too, so it's a fair question which circumstance they'd vary more in. I'm suggesting that it's possible for govts to come closer to stable prices than a fixed currency would, and offering the thought that most people would prefer that to the fixed "stable" supply of currency.
You're welcome to disagree. Just hoping to be understood along the way, I guess. Anyway, take care.