Whilst the community is still driven by enthusiasts, we should make a point (perhaps economically irrational) to generate/use/convert BTC, and not hoard it. Or, at least set aside a tiny portion for "savings" purposes.
then what you are in effect doing is making a rational economic decision between investing in the community as a whole (hoarding) vs investing in some specific endeavor or consuming some good or service.
I think we are in an extremely primitive stage of a currency/economy and until it comes "real" we might consider making an effort in taking less than rational economic decisions if it benefits moving the economy forward. We are probably in the early seashell stage currency development, and the seashells are not so widely useful either. I doubt seashell spenders thought much between one economic action over another. They were just glad that they found an instrument that beats bartering slightly.
Like many on this forum, I have to confess that I'm not a economist and these are merely my hopefully commonsense thoughts, rightly or wrongly.