This is what I carry, when I carry anything at all. But I don't conceal it. Sometimes I hike with it if the area is known to be where there are cougars or I’m somewhat likely to run across a bear (black bear, not a grizzly which is very rare around here). If I hike in the Rockies, a grizzly is more possible, so I'd carry.
I believe there’s only been one murder in my valley in the last 40 years or more, and unarmed assaults or fist fights in public areas are very rare. There are probably domestic assaults (usually male partner slapping around — or otherwise — his woman of kid). But I don’t have to directly concern myself with that. Home invasions are nearly unheard of. Even in our larger nearby towns, murders or armed assaults are quite rare. A belligerent drunk on some sidewalk probably happens once in a while.
True, if we’ve heard about a “weirdo” wandering around anywhere near our neighborhood, we might keep this spray handy in our home. But it’s never come to anything.
The big cities are distant from us, and it’s true that they to some degree have the nasty problems — more fights (bar or street), assaults, gang-related shootings, sexual assaults. But in Vancouver, the largest metro area in our province, the rate of these is fairly low as North American cities go. I never carry anything (even bear spray) when I go out there for a few days. (I suppose I’d conceal my bear spray if I wanted a weapon in the city… I’m not sure how legal that would be there.)