Well, I thought I was satisfactorily armed until I read these posts!!

A person should probably give a lot of thought to the potential risks (violent crime) that he/she is exposed to within his/her own environment (where you walk, where you drive, locations you visit, etc.). Also give a lot of thought to your OWN CAPABILITY to handle other types of weapons/defense tools.

My guess is that 10 different people would come-up with 10 different answers to these questions. And each answer might well be correct for that person in his/her circumstances.

In my own situation, I have concluded that ONE firearm that I am experienced in handling is the answer. If this were to fail (e.g., an attacker "got to me" first), I rather doubt that a backup weapon would do much good for me (considering what I can do and what I cannot do).