If you don't smoke I suggest buying cigarettes and extra bullets rather than any meme currency. You can trade cigarettes for a profit every time because you will never use your own supply and will hold onto it much much longer than someone who uses them. Bullets will be the future currency, mostly because they're always useful, same with water and things like chocolate.
I say learn to bake, people are gonna love someone that can turn the shit people leave behind in grocery stores into something pre-world delicious. Maybe I'm just trying to justify my own faggy hobby though.
On a side note, subcompact vs full size? I was thinking of getting a p320 subcompact because you can always carry it as a backup and it doesn't affect load very much while still having a 10+ capacity.