The most important thing about bitcoins is that when u buy things with bitcoins you dont have to give tax .
It depends on how your local government have set up their jurisdiction. In some cases you do have to pay tax over large purchases (e.g. property, investments in your house, cars, etc). It's not that Bitcoin offers anyone a free life without paying tax. That's something a lot people here seem to think.
It is very important to note that bitcoin is being widely used in the deep web for different purposes.
To me it's not important at all. Why would you (and others) care about what is happening in a 'closed' part of the internet the far majority of the people don't even know what it exactly is? I just don't understand why people constantly worry about what others do. In one case people shouldn't be holding their coins as it is "against" Bitcoin. Other case is that people shouldn't be able to purchase drugs with Bitcoin because they are "destroying" the image of Bitcoin. It's all nonsense. People must do what they think is right. If they purchase drugs, so be it. If they stock up their coins without any intentions of spending, so be it.