I have a card-wallet for my cards which has RFID-blocking (I think that’s what it’s called) built-in, precisely to prevent any chance of my contactless cards (I have two - one debit, one credit card) - being ‘read’ at a distance or when not in actual use. As a double precaution, I also have an RFID-blocking card in the wallet.

Belt and braces, me. (Braces are what Americans call ‘suspenders’. In the UK, suspenders are something far more interesting).