My alternative approach - log vs log(log) from 01.11.2011 to present. Conclusion: The log-log model seems to better fit the data than the linear-log model, and according to this model we are actually slightly under the trend line. Comments?
If each exchange doubles its capacity in time x and the number of exchanges also doubles in time x, it seems possible.
Possible - but keep in mind that there are many completely unpredictable processes.
Firstly the legal development cannot stop Bitcoin as a whole but it may have a tremendous effect on the price curve. Recent actions in China and India have shown what can happen.
Secondly underlying not identified risks may occur and implicate the development. Eg. information about lost coins which will eventually break down the value of Bitcoin at all. There was a very informative presentation on this point: http://tinyurl.com/lfzlhvp
Thirdly one of the altcoins or some unforseen new technology inventions could take over a bigger part of the market.
For now it looks like the curve will continue its surge but on the other side a breakdown could also stop Bitcoins success. Bitcoin is not that long in the market that it would survive every drawback like gold.
Apart from these points the very nice diagram does not look like the green log°log for me. Maybe it is log°log but with changed parameters - it should be more close to the red log line.