Sorry to be joining the conversation so late. I read the original post a couple of days ago, and it took a while to digest.
I think the OP presents a clear and valid discussion of the value problem, as far as it goes. But it obviously skirts the question of interest to most people, which might be phrased as, "What is a logical or rational price/utility curve?"
If you have a basis for identifying irrational price curves, then you could, in principle, hypothesize an "investment strategy," which might be as simple a deciding to consume later, or it might evolve into a more complex strategy of opponent modeling and exploiting irrational prices within a market.
I don't think this contradicts the OP's points, but maybe it clarifies some of the practical import of people's urge to identify an objective basis for the value of btc.
-pbtc
I think I established that the demand the urge to save value for later, and the supply is the urge to hold less than you currently hold. Aggregated, the urge to hold (measured in psychical value) is the total value of all coins.
Join me in this thought experiment: Remember back in your life when you were confident that you had enough money. Maybe just after you started earning, and before your consumption exploded (for some, that might be the current time). How much value did you hold in money plus deposits, measured in some form of value (the value of a car, the value of one month of consumption). For me, I have sometimes had the value of a used car in reserve, or stated otherwise, the value of a few months of food and rent. (Later, I bought flats and so on, excess reserves went into the loan. Don't include your other assets, only money and deposits). Lets say you can decide a number for yourself.
Now, imagine bitcoin is fully implemented, most people on earth define it as money, so you are quite sure that the value is easily exchanged for merchandise or readily exchanged for fiat, and the value of bitcoin is rather stable, but prices of merchandise expressed in bitcoin are slowly decreasing (weak deflation).
In this scenario, how much value would you prefer to have in reserve in the form of bitcoin. Compared to the first number you compiled above, is it less, the same, more, or far more? For me, it is certainly far more. No need to go upmarket in housing just to build equity.
The consequence of this (in case you and others also want to hold far more value in the form of bitcoin), is that the aggregated value of bitcoin also will be far more than the aggregated value of fiat and deposits as of now. Then divide by 21 million. I could say a number, but everybody can do that, and since we don't know, any number is as good as another. But you will quickly see that the value of a bitcoin can be quite high, far higher than now.
Now I will go back to being depressed because the current price is so low...