I typically only carry one at work/throughout town, if you don't count my two (or three or even four depending on whether cycling multi tools count) multi tools, because I don't need them for scissors, I don't need knives for cutting boxes (God-given hands and nails for that, I break down dozens every day clean and evenly without knives) and I usually use those nails for packages too. I use my partially serrated 3" folder for zip ties and paracord, but even then my multi tools are useable, and I carry a push blade, not for self defense exclusively, but also for the ability in emergency, to push through metals and punch holes into things etc. I despise necklaces, so no neck knife, but including my push blade and folding knife, that's two completely, 180° knives and knife purposes. You can't get farther or further apart in capabilities and uses.