In terms of wilderness scenarios about the worst case for me would be a broken leg while on a hike off the beaten track.
That actually happened to my dad on a hunting trip in Wisconson. He ended up dragging himself a few miles with a shattered shin. That left an impression. A simple hike can turn into an ordeal and I do lots of "simple hikes". I make sure I can signal, drink water, stay warm, or spend the night if I go out in the bush.

I take self-defense very seriously. Back in PA I have a CCW and usually carry. My minimum is a .38 special J-frame revolver but my normal carry gun is a Kahr K-9 or Glock 19. Here in Brazil I don't have a CCW (yet) but I do carry a Spyderco Endura or Newt Livesay neck knife as an EDC.

As far as our home goes I think it important to be able to avoid social unrest. About the worst case scenario for Brazil is a Police strike. When that happens it is very dangerous to venture outside and you have to bunker down and prepare for a home invasion. We have had one home invasion in my apartment building this year. I keep two loaded revovers in the house and often carry at home at night.

We keep at least a weeks supply of food and water in and I keep our camping gear organized in case we ever have to leave. Mac