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.)