You can be losing money even when you're saving. : Amid headlines of turmoil in the stock market, heightened global trade tensions and political tumult, it may seem like the safest place to store your money is in a savings account. But actually, just holding your money in cash is a bad idea, according to billionaire hedge fund magnate Ray Dalio. "That's the worst thing you could do because it is the surest tax on your money," Dalio tells CNBC Make It.