How much money do you have tied up in gift cards?

Billions of American dollars are resting in unused gift cards and digital wallets. Starbucks and Walmart together have about $3.5 billion, PayPal is holding tens of billions. Where is that money sitting and what do companies do with it? That’s what we’re finding out on today’s show. Plus: The latest China trade news, how to get your personal data back and why Iowa’s caucus app failed.