Still far below current market, huh? So, is the entire difference the speculative value you want to remove from the equation?
No, because there's the "holders". Those that genuinely believe that Bitcoin is a great store of value, and who hold coins accordingly. And at this point, your question kind of falls apart and it becomes clear it can't be answered meaningfully: Those holders (by and large) believe that Bitcoin is a great store of value *now* (which means the non-speculative price of a coin that you ask for must include this store of value contribution).
However, if some oracle would be able to tell, without any remaining doubt, that Bitcoin won't survive the next 10 years (and will be replaced by another crypto, maybe), I am sure a lot of the holders would no longer want to use it as a store of value. In that sense, their usage of Bitcoin as a store of value is after all based on some speculative assumption: that Bitcoin will be around in 10 years from now, and will continue to function as it does now. But since this is somewhat speculative, this contribution should be removed from the value of a non-speculative coin price.
I really like the first half of your post! Well detailed and thoughtful. I can at least partially agree with your conclusion there.
Currently, Bitcoin is a terrible store of value. Why? Because it loses value daily. This removes the store of value argument from the equation, and it then turns into a speculative decision to hold for 10 years (or however long...) at which time would then turn it back into an excellent store of value. But as long as it loses value faster than your Fiat of choice, it is a bad store of value
right now over that Fiat.
For those who hold coins from $100, 10, 1... It is still holding well over their initial value, but it is still losing value of their return. Coins from that era number on the minority side of all holdings to date, so it's not the largest group of safely held coins. The coins bought and held all the way down from the December top are performing on par with a short holder in the US stock market indices. Losing value every day.