"Libertarianism" with the capital "L" is crackpot economics with a massive dose of paranoia. For nearly a hundred years, wealthy rich people have paid right wing media to whip up resentment against income taxes while paying hack economists to float alternative tax strategies that would create a massive shift of the tax burden onto poorer people. And if someone has money to get their ego a massage like that, well good for them.
And if libertarians were just people who liked guns and weed, well count me in. But it's also a convenient cover for people with all sorts of scummy antisocial tendencies. Ron Paul for instance finally dropped out of public life when Anonymous revealed he had been coordinating his campaign with several notorious white supremacist organizations, which is why he vanished without a word of explanation in the middle of a campaign. The white supremacist perspective is that a libertarian win would let them slash the social safety net which would touch off a race war (which they've been prepping for some 40 years).
And then there are the "trust fund libertarians" who inherited a bunch of money, and calling themselves "libertarians" gives them an identity of some sort. Also I think it's sort of a general rule that the more dependent someone is, the more they have to blather about how independent they are. As a group, they probably more problems with dependency than average.