I ain't going back to the Tomb! NOT AGAIN! But yeah I like the name... I assume it'd only be used by those who're out of touch with the Vault and see it as nothing more than that and it is no longer their home.
They're ignorant savages. Why else would they have bottle caps... I am rather confused how Bottlecaps became a currency in the East since in the West it was because all to do with water traders but I find it odd that the East had it happen as well...
Because otherwise people wouldn't like Fallout as much anymore and would find multiple currencies be awkward. However through Kellog we learned that West to East coast travelling is very possible. Don't forget that