I don't think any of us keep pigs ....Scrot grows potatoes, tomatoes and beans - but hardly enough to use as currency.
I have my peg-makoing, of course.
Seriously, what skills do we have?
I can knit and sew...and know how to unpick materials and turn even polyester into yarn, for blanket making.
I'd also get some chickens, to use the eggs for barter...I don't like eggs myself, (nor chicken meat) but maybe I would learn to. What have BC members got to offer for barter?