If we have an event similar to the nationwide power outage portrayed in American Blackout, there is little doubt that we will eventually have widespread panic, looting and rioting by people who either don’t care or are driven to criminal behavior because of fear or need.
The duration of the hypothetical scenario in American Blackout was only 10 days, but for events lasting longer as in a societal breakdown caused by an economic collapse, we could be looking at years of chaos. With no formal way to purchase anything using what would at that time be worthless paper, people would need to revert to bartering.
I have discussed potential risks with bartering in the past that I still feel would be valid, but assuming that barter was the only form of commerce you could use I wanted to write down my thoughts on what I felt would be the best bartering items to have on hand. If you could stock up on prepping items now with an eye toward a future without money, what would be the best items to have on hand for barter with someone else?