Anti-penny legislation has been around for several years, and the US mint is already sitting on millions of un-used and un-issued dollar coins. As the average use of the coin increases, the average cost-per-use decreases — so the cost of creating the coins is generally thought to be recovered through circulation. But if neither pennies nor dollars see much circulation, we may soon see a penny-less society in the USA. Perhaps this shift could lead to bitcoins (or another online currency) start to gain mainstream traction."
Link to Original Source