Finally, a prank you can take to the bank. Back in 2009, U.S. Treasury Secretary Timothy Geithner announced the arrival of a limited-edition dollar bill that would be printed as an additional stimulus for the economy. Taking a cue from the U.S. Postal Service, the Treasury planned to sell 1 million "forever dollars" from May 1, 2009 to July 1, 2009. In light of the declining worth of the dollar on the global market, the value of forever dollars was locked in at the current conversion rate of 77 cents to the euro and 5 cents to the yuan.
Since forever dollars were potentially worth more than regular currency, the Treasury sold them for $1.05. To distinguish between forever dollars and dollars currently in circulation, the new bill was printed with red ink, and a prominent "F" marks each corner.
Next step: Tell your friends that you have a few of these forever dollars and are willing to sell them at a discount (say, $1.04).