P.S. The whole hoarding bitcoins thing is a myth. Deflationary economies work the same way inflationary economies work the pressure is just in another place. Deflation is a built in wage increase for workers. Everyone's money being worth more is more temptation to spend it because prices get lower and lower. But while prices get lower and lower companies have to continue to pay workers the same amount.
This is partially offset by their cost for materials going down but bottom line is that companies will need to increase sales to keep up. Luckily for companies, everyone makes more than before because their salary of 1 BTC/week is worth more so they can afford more, so consumption goes up.
The confusion comes from people who have bought into the idea that the economy is driven by investors. Never believe this, it's nonsense used to justify people who do nothing but add interest, increase prices, and/or reduce the quality (aka cost of production) of goods and services to "realize value" and thus make money without contributing to the economy but rather by detracting to it. Often these try to take credit for and/or mask their efforts by blending in with actual technology improvements.
The economy is driven by workers (Production) and consumers (Consumption). All value in the economy comes from workers, technology improvements for instance are the work output of engineers and researchers. Consumers purchase goods and services, goods remain part of the economy and have innate value and service availability has an innate value and the output of the service may have a value as well. Consumers generally spend pretty much everything they make.
If you must obsess over middle men (investors, lenders, salesmen, etc) then you should realize that these people want other people's money. Banks don't lend to beat inflation, banks lend to charge an interest rate that is their profit+inflation. With a deflationary system lenders can simply exclude the inflation number since the payback will be in deflated dollars and the interest deflates too. How much interest can they charge? Dunno, but it will be as much as the market will allow and so it should amount to at least the same amount of increased buying power as loans now.