When I think of one Bitcoin... that is ALL I think about!
To think any further is traitorous.
i.e. Bob says " well, if Bitcoin hits $10,000 US, I'm gonna sell some and buy a new car "
It's unacceptable to think in terms of fiat.
Show some loyalty, and when you talk about Bitcoin, that should be it.
example. Bill says " I have 2 Bitcoins. Gonna buy some burgers now. "
Come on, now. Only the earliest adopters can ever have claimed to think of it that way. And when people first started putting a value to it, of course they assigned a fiat value. You want to say burgers, pizza? The very first dollar value was assigned based on the electricity cost to generate it, and perhaps this is one of the underlying factors that continues to determine prices, at least when miners generate new coins and put it on the market.
Of course I agree that mere price speculation is harmful to Bitcoin, but I would suppose we can't live without the market. It is perfectly acceptable to think in terms of fiat - for now. Perhaps one day people will think of fiat in terms of Bitcoin, but that day is far away and needs maturity.
P.S. If Bob wants some burgers for a couple of Bitcoins, hit me up. I'll throw in some drinks too. A week's supply since I'm generous.