The key is to have NFC on a device with TouchID where NFC is only turned on when expressly authorised by the legitimate owner. THAT will change the game.I think there is already a thriving market - even my office hands out copper mesh lined credit card envelops for our company travel cards!
Personally, I use a HuMn wallet with my cards sandwiched between the two plates. Fairly expensive but a great minimalist wallet.