Post-War currency

The currency in the Fallout world has varied from game to game.

Fallout and Fallout 3: Bottle Caps
Bottle Caps, also called Hub Bucks, are the standard currency in the first Fallout game. In Fallout 2 regular money has been introduced and bottlecaps have been rendered useless and can only be found in Broken Hills.

Fallout
Bottle caps are backed by The Hub merchants. The reasoning for their support is that the technology to manufacture bottle caps and paint the surface has been lost in the Great War, which would greatly limit any counterfeiting efforts. Secondly, there is a limited number of bottle caps, which would serve to preserve their value to some degree.

The issue of some concern is that with time, number of bottle caps will decrease due to wear.

Fallout 3
Bottle caps make a return as the standard currency of the Capital Wasteland in Fallout 3, most likely due to the Capital Wasteland's isolation from the more civilized western coast. In addition to bottlecaps, a form of pre-war currency (most likely American Dollars) can also be found in the ruins of DC which can then be sold to merchants in return for bottle caps. Also of note is that, unlike previous Fallout games, when you drink a Nuka-Cola, its bottle cap is actually added to your stock.

Hypothesis of Depiction
The graphics show bottle caps as having the rimmed edges pointing outward. This depiction is likely a production decision to communicate the "bottlecapness" to the player; in real life the caps would have most probably ended up flattened over the passage of time, or intentionally pressed to increase the carrying capacity for the individual.

Fallout 2: Gold Dollars
In Fallout 2 it was dollars backed by gold in value and being used by the 3 big powers of New California Republic, Vault City, and New Reno, bottlecaps therefore becoming little more than nostalgia as at least one of the three described powers had influence in just about any civilized spot in the Wasteland.

The town of Redding uses two different kinds of mine scrip that are basically equivalent to the more common gold dollar.

Fallout 3: Pre-War Money
Pre-war money is the currency of the former United States. Although faded, the notes appear to be American dollars. Pre-war money is no longer the official currency of the United States; the actual currency varies from region to region. The West Coast has developed a new currency after having used bottle caps for a number of years. The DC region, however, still uses these caps, having no means to produce its own currency.

In Fallout 3, pre-war money appears as a stack of indistinguishable bills. The item is valued at 10 caps per stack. Pre-war money is somewhat plentiful. It can be found nearly anywhere money might be found in real life such as Cash registers, safes, and desks. For whatever reason, it can also be found in Garbage Cans. The Super-Duper Mart is one location that has a large quantity of Pre-war money located in each register at the checkout.

Residents of Point Lookout might still use this form of money as it is found on their corpses from time to time.

Money in Fallout Tactics
In Tactics, both Brotherhood scrip and Ring pulls are used, the latter essentially being the same as bottle caps: ring pulls are pull-tabs from soda cans.

The Brotherhood scrip (or Brotherhood scripts) is/are a currency used only by the Midwestern Brotherhood of Steel for trade within the Brotherhood. Brotherhood traders accept only this currency with the exception of some outsider traders that are present in most bases and accept ring pulls.

Ring pulls are used by the Midwestern Brotherhood of Steel as currency when trading with outsiders (non-brotherhood). They are actually pull-tabs ripped from soda cans. Ring pulls can be found all over the settlements in early missions and traders will accept them. There are usually some outsider traders in Brotherhood bases who will accept ring pulls as well.

Ring pulls are probably used as currency for the same reason that bottle caps were used in the first Fallout game: the difficulty of making them with post-war technology reduces the odds of counterfeiting.

Money in Fallout: Brotherhood of Steel
Brotherhood of Steel uses Caps, though due to blatant product placement replacing the beloved brand Nuka-Cola, Bawls bottle caps are worth extra.

Waluta