Ditto.I've carried a knife since I was 9 years old. If I've got my pants on, I've got a knife. I use my knife as a tool. I've always used a folding knife, some with lock blades and some without locks.
If absolutely necessary, I would use it as a self defense weapon. I have been trained, but I must admit the training was not advanced.
If I were to carry a knife as a weapon, and wanted to depend upon it to save my life or take another, I would want to have a fixed blade designed for such activities.
But without the fixed blade option, I carry my Kershaw blackout.