PSA-graded trading cards stolen in delivery truck heist

Thanks to the popularity of card games like Pokémon, the trading card business has boomed into a multi-billion-dollar industry — and criminals want a piece of the action.Case in point, collectors who sent their valuable trading cards to PSA, or Professional Sports Authenticator, to get their cards graded were shocked to find an email in their inbox on Monday letting them know that their cards had been stolen while in shipment. Images of the email went viral on social media, and…