I was days away from entering the Bitcoin marketplace until I read that. Now I realize it's speculation propping up an artificial market price. Saying that, I would be open to hearing opinions on estimates of the true value of a Bitcoin, based on it's use cases and value proposition if anyone has any...
You can set your philosophical bar of "real value" higher than that, but there's not much light of day between that and a standard so high that it's not even theoretically reachable, at which point I stop caring about your definition of "real value" since when nothing can meet the bar, it's not a useful concept anymore. (But I do mean "not much", not "zero".) In the end, all value stores are transient on a century timescale, and I don't see that changing. Even gold hasn't had anything like a constant value. But for a putative currency, BitCoin is distinctive in its total disconnection from a concrete value.
Forget it. Nobody knows. It's a function of how big the Bitcoin economy gets, and how many Bitcoins people decide to keep in their wallets. (It's convenient to keep some amount, to save the hassle of doing conversions all the time, but the volatility of the currency may well dissuade most people from keeping large amounts.)
I'd guess that the percentage of miners and speculators in the BTC market who are economically irrational in their activities is a lot higher than most of us think it is. Ergo, I don't place too much faith in any models, theories, or projections about this market that lean heavily on assumptions of rational actors.
Following from this logic, I can't justify taking a significant position in this market. The risk is enormous, and as risk goes, it's not incredibly attractive compared to alternative investment vehicles or strategies.