Earlier quoted context omitted.
What is scary though is how easily the rfid can be read off of a person. It's a great thing to have but card issuers should include some kind of protective sleeve with every card rather than relying on the consumer to be both aware of and able to use an rfid blocking wallet.
Old payment card RFID contactless was really insecure; it basically spat out the data on the magnetic stripe. New contactless is directly tied to the EMV chips and requires the whole cryptographic round trip and such. You can put a protective sleeve around your cards if you want, but it doesn't really add much in real security anymore.
I use my app, not my card, for this reason.