I agree with you about the "new Currency" being based on the .22 cartridge. I bought up a bunch of 500 rd boxes recently, on sale, and have been saving them back "in case". I plan to use them to buy 9mm and .45 ammo.
Just kidding, I have several .22's and they need feeding, too. But I personally want more oomph for self-defense.
Seriously though, I carry a .32 all the time, but don't really feel it's adequate in the worst case scenario I can imagine
realistically happening. I carry at least a 9mm more and more often.