Depends, on what you’re trying to protect. EMV transactions are far more secure and don’t actually transmit any bank info, they’re just one time transaction hashes generated cryptographically that are only valid for a short time.

You’re more likely to come across a skimmer at a gas station that’s reads you card details of the mag stripe, or having your card leaked in a data breach.

The only time I’ve seen RFID really being attacked is red teams tricking employees to clone security badges outside office buildings. So I guess put your security badge in an RFID sleeve around your neck lol

take any aluminum can, cut it open, cut a plate fitting in your wallet, insert it there so that it sits on external surface if your walket, done, that’s your yeehaw rfid blocking sleeve, extra mass 1g

if you want to scan bus pass you can put that card on external side of it