We didn't lose anything. Private banks, Private Trading Companies, Private Indidvidual Traders. In short... gamblers lost at their bookie's shop. Some fractional reserve currency lender/ gambler croupiers apparently "lost" some big sums. I suspect that they made it back by backing their losses with some short selling beforehand, during and after. And as the money never actually existed outside of their balance sheets I am sure they simply started a new sheet. It was mostly very high profile financiers and their games.
Games where we ALWAYS lose anyway. They made the game, designed the rules and run the board.