The Devil's Advocate
Call me Dad
Just to be clear to everyone... Walking around with a knife in most states is illegal as hell and will catch you a charge.. I know we on some "knives are better than guns" but you can get a gun carry permit.. Ain't no 7 inch blade permitLol but seriously you don't need to spend an arm and a leg. And you don't really need a special brand as janky as it sounds. Spend about 30 bucks on a good one.
Folding knife 7inch
Keep it maintained. You have manual sharpners or electric ones. I like the manual ones as a preference.
As long as the knife is good quality you can make it as sharp as you want it to be.
Just don't chop yourself up.