But you see the one thing that stands in the way of a libertarian utopia is the same that will never allow for the socialist utopia that leftists dream of.
That thing being human nature,which is comprised of such things as greed,laziness etc.
Also, libertarianism USES human greed as a positive force for advancement and change. Innovation. You get to keep what you EARN, but try and steal anything and your victim just may kill you and be morally right to do so.
BIG behavioral modifier there, that whole "death" thing. Zero recidivism rate.