See the videos at this thread; I found them very enlightening. They constitute an interview with Ayn, and what is so surprising is that the interview takes on a surreal form as if the interviewer, Mike Wallace, were a character straight from Atlas Shrugged interviewing Dagny.
http://www.freerepublic.com/focus/f-bloggers/2172674/posts
Rest assured, the twists in the plot ahead will quite eclipse any thought of a particular currency used in a particular place.
In watching those old tapes, I saw Mike Wallace as Bertram Scudder.