No bullets or bottlecaps as currency. =(
Bullets would kinda make sense (just about anyone can make use of bullets) but it’s obviously straight out of Metro.
Bottlecaps makes no sense whatsoever. Fallout had two hundred-or-so years for the economy to crumble and be replaced by bottlecaps. Which is still silly. If there’s any reason to use bottlecaps as an exchange currency then there’s equal reason to use the existing metal or paper currency which is more varied and better suited to being carried.
Frankly the idea of a new, non-barter economy developing within a week of the death of 99% of the population is just absurd.
People are going to be asking themselves ‘what do I need, what am I ill-suited to get myself.’
I’d really like to see ‘archetypes’ set up for NPCs that have their own trade-interests. NPCs are always willing to trade but have High, Normal, and Low value for items based on their own personal needs (based on their skill-sets and faction), as well as many (most) items they just aren’t interested in. A character with a lot of food may be willing to trade their food for less than someone who has very little, but as you trade for more of their food the value of the food goes up. They aren’t going to trade their last can of spam to you for a handful of .22 rounds, but they might sell one of their stack of twenty cans of spam for a handful of .22 rounds. And skills can play a part also. A character with a lot of Survival may be willing to trade food for cheaper than someone who can only get their food by trading (they have no combat or survival skills).
Once in a while you’d find dedicated ‘merchants’ who operate with larger stocks and a more capitalist look at goods; they aren’t just interested in goods for themselves, they are interested in goods they know they can trade with others. As a result they will rarely trade top-dollar for any item but have a wider selection of items they will trade away and for. These people have probably occupied and barricaded a store front, they might have guards, and if you try to steal their stuff they will go hostile. (Warning on pickup?)
I imagine the devs have all kinds of ideas on what to do with NPCs so there’s probably some overlap there.