Well, the slow destruction of the distinctive, historical, and elegant appearance of the American currency is almost complete. Soon it will look like just about every other nation's money: rainbow colored and disordered.
I'd like to see them introduce a $200 bill for common circulation. With inflation, a $100, while still a little rare, doesn't represent enough value any more.
http://izismile.com/2010/04/23/how_100_dollar_bill_changed_i...
Was it really impossible to prevent counterfeiting without doing this?