TP will be good barter stuff for as long as you can stay put, but though easy to store, it’s hard to hide & to take much with you when/ if you need to bog out.
The trick is to figure out what can serve as a medium of exchange in lieu of “cash,” when cash becomes unavailable or verboten. It must be easily recognizable, commonly desired, relatively durable, divisible/scalable, and not immediately usable against the bearer. Common cartridges may do, but only for exchanges with trusted parties. I don’t expect the fedgov to immediately outlaw common minor US silver coinage, though eventually they might. But by then, we’ll be deep into the collapse/Dark Ages, and all exchanges of goods are likely to be one of a kind, until some sort of order is restored.