Even though credit cards now feature an EMV chip for securing transactions, they still have to include the magnetic strip for compatibility with older point of sale systems. Because of this, there's no way for the chip's new security capabilities to protect against card skimmers in the wild.
How do you protect yourself from legacy-technology-induced fraud? Keep your cards hidden in an RFID-blocking Wallet, like this one from Ideka. These wallets are slim and functional, and prevent unauthorized scanning of your cards when they're in your pocket. They store up to 8 credit cards in easily accessible pockets and have an extra pouch with room for cash.
These Ultra-Slim RFID-Blocking Wallets won't weigh down your pockets and can help prevent theft without giving off tin-foil-hat vibes. Usually $30, you can grab one of these faraday-cage wallets for $22.99 in the Boing Boing Store.