OK, the other comment was bored, lazy and not very sincere.
Ancapitalism is probably one of the most stupid systems you can invent as it basically deconstructs itself as one individual amasses so much wealth they become a de facto king ruling over everything with absolute power destroying the system that helped them amass such power.
No. To learn about ancap, go to ancaps and not to non-ancaps writing about ancaps.
It would end in actual feudalism as in few people amassing goods, land, resources and ruling over the masses as kings with their monopolies and monetising air you breathe or the like. Killing you for disobedience in some private execution using private justice system keeping u in check with private militia.
No, because ancap is not the same as anarchy by Hobbes.