I am using bitcoin as I believe that its not only the medium of transaction but also a technology which is base of futures economic world. Especially when it comes to value of currency of digital world, we should be able to use it without any restrictions and control. I am not in the favor of tax evasion but frankly you cant trust governments. So Im okay with paying taxes but I cant accept any kind of external control on currency that I use. So I use bitcoins for all these things and thats why its important to me.
I really like your thinking,that we can not trust goverments.
My opinion is actually the same,i love using some currency made not by a government,but made by real people,who were looking for something different.
Also the another great thing with btc is as you said,it is not controlled by any people,so we really see what is happening with it without any manipulation.