Predefined inflation curve is fundamentally different from hard limit. Predefined inflation would avoid several difficulties, miners having to transition from inflation-driven to tx-fee rewards & lowered investment incentives of non-inflationary money amongst them.
I don't see the point in continuing the current rate, which would probably mean that we would have increasing prices forever. A rate of for instance 1-2 % would account somewhat for increase in population plus increase in productivity. Anyway, as long as the rate is predefined, it would be sound money. A high inflation rate of 13 % only means that all contracts regarding the future would have to have a formula attached to it. For instance, the rent for an apartment is 3.5 *1.13/12** months_from_now btc per month. I just don't see the advantage.
Oh, i agree there's no reason to keep inflation high & 1 or 2% may be enough. It's the set limit i have trouble with.
If i'm understanding you correctly, this "real value" is measured by demand, which remains in constant flux?
With real value I mean just a way to measure it, as in the value of a house, the value of a month's work, the value of a month of food supply etc. Since we want to asess a value of the money supply, it does not make sense to measure it in money.
I think this is where i lose you: The value of money is traditionally measured in other money.
The value of a house is denominated in money (dollars, rubles, pounds, yen etc.).
The value of each of these currencies is denominated in other currencies (rubles/dollar etc.). It is also possible to denominate money's worth in fractions of a house (or commodity bundle, or market basket, whatever).
Here's my problem:
If 1 BTC bought one house, and *another* house is built -- where does the extra BTC come from to buy that house?
I'll strip this down to something manageable & hopefully a bit more clear: Assume there are only 100 BTC in our model, and 100 houses to buy with them. One BTC is valued at one house. Some new people are born, and slap some mud & grass together, building a new house. Now there are 101 houses, but only 100 BTC to buy them with. Has the value of 1 BTC grown by ~1%?
In the alternative: A big tornado comes to our 100-house model, destroying half of the houses. Now there are only 50. How much is one bitcoin worth now?
You can see (well, i can) that the value of bitcoin is closely linked to the health of economy, or (in the case of valuing it in other currencies) the health of other economies. It could be argued that the fiat is far more stable, due to the very fact that it is manipulated.
I am confident that an Austrian school adherent would argue effectively that the size of a monetary base has no effect on real values. Certainly there would be differences in ledgers, but only as measured in nominal terms. A dollar does not represent a loaf of bread, but rather a potential claim upon an amount of bread that is unknown until the dollar is exchanged.
I see no reason to assume that the velocity of money would be different if the value of a dollar was equal to 1 loaf of bread or 100.
The rule that I try to argue for here, is only relevant for sound money. The austrians care only to talk about an economy with sound money. If the money supply including debt can be changed due to seasonal changes in demand, weather, and the whims of a central planner, no rules can be made.