I'm pretty sure I won't be around long enough to see anarcho-capitalism—or what I call market-ordered anarchism—prevail in the United States. I'm just as sure that I won't see government strictly limited to protecting individual rights and never violating them (if that's coherent).
So that's a wash.
But it doesn't follow that discussing individualist, pro-property, free-market alternatives to the current, virtually out-of-control political system in America is time wasted. Far from it! If we want to progress toward liberty, we'd better get a move on. The only proper way to proceed is through discussion. No name-calling—no shouting Statist! or Tyrant! or Fascist! or Oppressor! or Psychopath! or Warmonger! Just discussion. (I almost said "civilized discussion," but that is redundant.) People can be badly wrong with the best of intentions. We all know how the road to hell is paved. Nevertheless, don't insult. Rebut. Refute. Don't go for the jugular. Be patient. You once did not know the case you're making today.
