User blog comment:Evans0305/BioShock Infinite gameplay videos/@comment-939754-20110701101116

I wasn't sure where to put this in the articles, but I believe I've figured out the currency in Columbia. Considering Elizabeth is so eager to point out what she thinks is gold, and the image that comes up when Booker looks the cash register, I believe the primary trade is gold in any form. Booker obtains gold coins, it seems.

I feel like considering Elizabeth might be able to form gold into coins, considering that gold busts would be difficult to bring around, but that seems highly unlikely. However, in the first gameplay trailer, she forms a ball of metal from apparently gold panning equipment. Maybe she can use it in some way?