The reason for sharpening it would be to have a knife that was actually usable; not so much for defending yourself (although it would be better than nothing, in a pinch) but for the usual everyday tasks one would use a knife for. I carry a Leatherman multi-tool all the time, and I suspect that I use the knife blades as much as any of the other tools, for opening packages, cutting twine, and so on. The sgian I have right now is Cold Steel's Braveheart, because I wanted one that was functional. I'm not thrilled about the look of it though, and am considering making a plain leather sheath and putting a new handle on it, if I can figure out how to get the Kraton off it without messing up the blade.