I find it quite funny that just after the great mccorvic-Mosper debate there comes several other posters to provide evidence to the case.
Dargo, jubalix, Spaceman_Spiff all pondering the issue of bitcoin increasing value and adjusting their behaviour with the purpose of not losing bitcoins in this situation.
I am fully confident they are all just trolling and saying stuff they don't really mean.
Actually, I only read the last comment before replying. I missed The Great M-M Debate of '13. I totally meant what I said.
That being said, its possible that some people will think: I won't spend my bitcoins, they will be worth more in the future. But unless converting fiat to bitcoin and buying stuff with bitcoin subsequently is more expensive than buying it with fiat (thus, in absence of a better price with bitcoins), they are acting stupidly. More experience in dealing with bitcoins will generally diminish stupid behavior (somewhat).