Paracord is too bulky for pocket carry of enough length to be useful to me. I will EDC 25-50 yards of 120 lb test dacron. It is small enough to use as dental floss (be careful because it's abrasive qualities will cut your gums something fierce if you aren't). It works well for stitching up clothing, leather, plastic, or flesh. It doesn't biodegrade, but it is susceptible to UV decomposition. It doesn't stretch and it doesn't shrink. You can fish with it and it'll handle 200 lb halibut or 70 lb king salmon, yet still be light and soft enough in the water for catching crappie or bass or trout. It is wicked netting and snare material. It works really good as a lashing material for constructing a primitive shelter. It makes a most excellent backing for duct tape.

10 strands of 120 lb dacron yield enough strength to use it as a climbing line, except that dacron has no give to it, so it is a bit hazardous if you slip and free fall any distance, and the diameter of the rope will be too small to grasp properly.