I don't keep my savings in cash, but I can withdraw as much cash as I could reasonably want at zero cost from my bank. How can I do this (i.e., USD->spending money conversion for free) with Bitcoin?
Also, are you making an assumption that the volatility of Bitcoin<->USD will go away at some point in the future? If that happens, keeping Bitcoin around instead of USD will become reasonable.
> But ultimately smarter people than me will figure out the right model. That's the beauty of software platforms.
Sounds like wishy-washy thinking which I hear a lot of from bitcoin advocates.