It seems that most of them are in the US or "US-like" countries, so it cannot be freedom of speech, religion, travel, residence, association, study, dress, drink, sex, marriage, work, property, trade, investment, enterprise, and many other basic freedoms that the citizens of those countries enjoy to a higher degree than most other people in the world (and that bitcoin cannot do anything about anyway).
So, what exactly are those "freedoms" that the "libertarians" miss, and hope to get through bitcoin?
Freedom of association? You've never heard of "Affirmative action"? Residence? We can only live in areas that are zoned residential. Speech? This is why Bradley Manning is in supermax prison and Edward Snowden is being hunted like a war criminal? Sex? Prostitution is legal in a few counties in one state out of fifty. Travel? try driving without a license. try traveling without a passport. Permission to travel is not freedom. Not needing permission is freedom. Religion? so Muslims and Fundamentalist Mormons can have multiple wives? Rastafarians can spark a joint in D.C.? Pacifists like Quakers and Mennonites don't have to pay taxes that fund wars?
I could go on and on. Most Germans in Nazi Germany thought they were free because all of the things that were banned were things they didn't want to do anyway. That's not freedom. Real freedom means freedom to be unpopular.
So many people do not understand freedom. You're not free when you can do something. You're free when you can do whatever you want, no questions asked, unless you break someone else's freedom. Since there are always petty conflicts of interests (smokers vs non-smokers), apply tolerance. If you don't like something, it's generally you who should adapt/avoid.