Whenever there's a big economic crisis, investors usually flock to the safety of gold or U.S. government bonds. But when things got crazy in the last couple weeks in Cyprus, it was something called Bitcoin that surged in value.

A currency war sounds weirdly abstract, like a game played by rival politicians -- but it can have devastating effects in the real world. And it’s not all that different from a rivalry of different kind – a hypothetical sibling rivalry.

How do you stop a counterfeiter? Holograms are out, but bank note windows are in. We talk with the CEO of Fortress Paper, a company that makes special paper that money is made from, with a focus on security.

A trillion dollar coin? It’s legal for the Treasury to mint and it could resolve the debt ceiling debate. But don’t bet your paper money on it.