I would point out that I don't think anyone is saying that bitcoin and other altcoins should become the only, or even the main currencies in use.
> You think it's for good reason. Many people think it's for bad reason.
In reality, you are both right. There are both 'good' reasons and 'bad' reasons why the state wants control over monetary supply and flow. I feel that as electronic currency transactions has gained ground over cash, the 'bad' reasons have become stronger and more important.
The question really is to if degree that bitcoin undermines the good reasons for state monetary control balances with the degree that it undermines the bad reasons. I suspect that as electronic transfers become increasingly ubiquitous, we will see the importance of bitcoin in maintaining personal freedom increase.