Bitcoin is an inherently deflationary currency. However, Keynesians would have you believe that a deflationary currency is bad because it forces people to horde and not spend their money. This propensity for people to generally horde a deflationary currency is good because it aligns the capital interests to appropriately be deployed to long term investments rather than consumption.
Once Bitcoin has appropriate lending markets it will help the economy drastically to allow for sound lending markets where lenders are getting appropriately compensated for long term lending. The gov't is constantly destroying the credit markets with low interest rates through the central banks to prop up toxic non producing industries like Real Estate. Once the Sovereign credit dries up, (which is currently happening in the US Bond markets) the governments will no longer be able to keep interest rates low.
This is where bitcoin will come in and replace these fiat currencies as sound money =)