I have another thought: It could be regarded as a digital asset which is very secure and can hedge against inflation, since it is not issued by any government, the risk of default is zero. But first the exchange should be well regulated and accepted by pension funds
And if lot of people put their savings into BTC, it will reduce the unemployment (they dare to spend more since their retirement is secured now), and inflation will be low (Fed does not need to print more money to stimulate spending)
I don't think bitcoin can be considered very secure at the moment, but I think you have a valid point that in the future, if bitcoin has grown and has shown itself to be secure, people might consider it a very safe way to keep their savings. Due to the inherent inflation-protection, this would indeed reduce fear of loss of purchasing power in economically bad times (such as exists among several economically interested people today). This could indeed lead to lower volatility in spending behavior, as this would probably be less correlated with the economic cycle.
You mention unemployment a lot, and the effect monetary policy has on this.
First of all, I think it is important to realize that employment rates don't necessarily say a lot. I am not talking about differences in U3 or U6 or whatever. Just that it is actually quite easy to have 0% unemployment. The question is if the jobs created are productive or meaningful jobs. It would be very easy for a goverment to decree that everyone who doesn't have a job will now get paid for the job of "stone-smasher", consisting of finding stones and smashing them to little pieces with a hammer... There would be no unemployment, but obviously living conditions would go down as many people go about smashing stones, while necessary products and services are being underproduced or under-offered. This might sound ridiculous, but although I am not sure if this is historically correct, I believe a similar situation existed in many communistic countries, where there would be a lot of unnecessary functions created to get full employment (I have heard accounts of small shop having many employees, most of them just sitting around, from time to time working the register or putting some foods in a bag, then sitting around some more).
Now, with inflationary monetary policy and low interest rates, lending is encouraged. This reduces the threshold for companies to be profitable, so certain companies that would not be profitable if they had to pay a lot of interest on their loan can now start up after all. As they need employees, unemployment will be reduced. However, high inflation risk and low lending rates also enhances the risk of malinvestment, in which bad companies get money that is put to work unproductively, which is destructive for the economy. Therefore, boom conditions will often lead to recessions. My guess is that in a BTC economy, if the deflation isn't too strong, overall economical growth will be somewhat lower, but there will be less booms and busts, so the system should be more stable.