Only thing I carry (except obvious as pointed out by five-eight-niner

) is white cane. Makes good club if crook is dumb enough to allow me to fold it, has nice cord for strangling, can be swiftly disassembled for pointy sticks... Not that I ever have had need to use it as weapon. Much more a tool.
I would carry firearm if:
a) it was legal and
b) I could actually hit my target
I would carry knife if:
a) it was legal...
Where I live there are instances when
something more lethal would be nice to have. Drunks aren't trouble, nobody has tried to rob me - actually nobody has ever stolen anything from me (yet) and we don't (yet) have gang problem (other than Hell's Angels, Cannonballs etc.). Unfortunately I seem to attract drug addicts and other nutjobs who want to share either:
a) their view of the world... or what ever it is where they are at the moment
b) tell that they are dwarfs, elves, gnolls... (tends to change along the way)
c) that they can fly
d) what they are going to do to me or
e) ramble something I can't reasonably figure out
So far calm attitude and treating them as totally sane has kept me out of trouble. However I would prefer to have something to defend myself as running away isn't in the cards (where would I run?).