I think the charts, albeit pretty, are not so much useful to understand the future trends of bitcoin.
This chart, in my opinion, just suppose there is no changing in bitcoin vs the US$ and the price depend, heavily, just on adoption and use.
It is not so.
The inflation rate of bitcoin M0 and US$ change with time and the differential is gone from negative (against bitcoin) to positive (for bitcoin) in the years.
The differential in the inflation rate is what cause bitcoin to have a gravitational pull stronger than any other fiat currency, and is a big cause of the increase of exchange rate, adoption rate (for practical mundane reasons) and so on.
It would be pretty useful if someone could make a chart comparing the inflation rate in bitcoin with the inflation rate of USD e € and the differential.
Lower the inflation rate, at this point, faster bitcoin will suck up value from other fiats.
I agree with this underlying point. Trend charts are nice, and can often tell a story, but can often be largely useless in terms of prediction.
On net, Bitcoin's "price" is an exchange rate. Therefore, I also agree that the $US changing money supply will impact Bitcoin price changes in US$. Think about it this way, if there are more dollars floating around (or being printed), the value of a static good should increase (via inflation). The same holds true for Bitcoin, perhaps even more so, since some are using it as a hedge against inflation. In other words, demand will increase when the Fed declares QE-to-infinity part II. This was true towards the end of of 2013 when Bitcoin hit new highs while Bernanke reneged on promises to start cutting monthly QE.... the price for Bitcoin jumped in response. Now, in 2014, since Yellen took over they have begun monthly cutting to QE (despite a recent "pause), Bitcoin price is relatively lower. Don't get me wrong, other elements (Mt. Gox, etc) certainly play a huge role in fluctuations, but some of these elements are unpredictable. At the very least, domestic currency elements should be included in a Bitcoin price model.
If someone posts the monthly Bitcoin data history here (up-to-date). I would be happy to create a quick model, incorporating M1 or M2.