Well, you are certainly right about there being no money in a truly
anarchist society. And I think Bitcoin, while it is decentralized, it still based on cash; which means that people will still make demands for what they produce. This is the main reason why it will still objected by anarchist. The second reason for rejection is why people will get into anarchism as well as other schools of anti capitalist thought is that there still will be accumulation of wealth, which means that a small number of people could still get a lot of money while others will end up being short.
Now having said that, I have other thoughts about Bitcoin, as I have been having idle curiosities about it since I have first heard of it a few months ago.
For one, it does rely heavily on people accepting it, and its value is still fluctuates against other currencies. This is problematic because, at least at this juncture, you still don't know if your paying to much or too little, and the same goes into accepting it. Like all currency exchanges, you still have to pay a usury fees, which will still be a problem unless it gains acceptance several fold, so that you count on using for another transaction it when you get credited for it.
Also regarding mining, I noticed that it often will take a long time to get your coins even when you keep your computer on for a considerable time. When I realized this, I quit bothering with the mining, especially when I don't expect to use coins in the near future.
There are some potential things about it that anarchist may appreciate, as we still live in a society run by money. For starters, if you had to bury your tracks, it is a way to make transactions that are difficult to trace or is difficult to stop. Take for example when people were giving to Wikileaks when suddenly the rug was pulled from under them when Paypal, major credit cards, and financial institutions refused to handle the transactions. This is what drew my attention to Bitcoin, though Wikileaks still aren't using it, probably because the strong limitations. But if such option is available, you could buy your Bitcoins use them for a transaction, and the person on the other end could cash them.
In other words, this is handy for contraband especially if you are carefully using proxies such as Tor. One example is Silk Road Market
, which unfortunately isn't taking new customers right now, but when they were open, you could buy pot or other not so legal stuff. Perhaps you need some weapons for the insurrection?
Now in the cover you ass department, I would certainly would not advocate buying illegal things or laundering money. Nor will I advocate for an insurrection or watching American Idol.