Here is a goal: What do you do after you're satisfied with the length of the helix paracord key fob?

Which way makes more sense to accomplish this goal?

Available options:
a). After you're satisfied with the length of the paracord key fob, cut off the excess paracord and burn the ends..
b). After you're satisfied with the length of the paracord key fob, just leave the excess paracord the way it is..
a).