The penny is worthless. Actually, it's worse than worthless. We lose money minting each copper Lincoln face. It's waste and a bother and we should kill it forever.

The $1 coin is a different story. Americans won't use it, but they should. Since coins last longer than paper notes, replacing the dollar bill with the coin could save us up to $700 million every year in printing costs. Instead, our love affair with the greenback is breaking the back of the U.S. mint:

In hidden vaults across the country, the US government is building a stockpile of $1 coins. The hoard has topped $1.1bn - imagine a stack of coins reaching almost seven times higher than the International Space Station - and the piles have grown so large the US Federal Reserve is running out of storage space.

Read the full story at the BBC.

We want to hear what you think about this article. Submit a letter to the editor or write to