When you say "pocket knife", I assume you mean a folding knife that is comfortable to carry in a pocket for use as needed. I'm not thinking of a weapon or knife for routinely processing game. I think a Victorinox Swiss Army knife is useful and easily carried in a pocket. I have a Pioneer and a Farmer that I carry. The blades do what a knife is designed to do...cut stuff. The can opener and bottle openers and awl, etc. get useded as much or more than the blades...They are non-threatening and are well made and reasonably priced...I've carried one frequently during the past fifty plus years...Not "tactical" but practical.