Gold is having a moment. Is now the time to invest?

In the world of investing, gold is having a moment. Last year, the price of gold crossed $4,000 an ounce for the first time ever. But does that mean it's time to rebalance your portfolio and get in on the precious metal action? This episode, NPR finance correspondent Maria Aspan explains why the world has been so obsessed with gold lately, how you can invest and whether doing so makes sense in the…