Be careful with having your card exposed; there exists a scam where someone puts a chip reader waist level in certain places, like a crowded line, where it'll skim off a few dollars off anyone who gets close enough. The rfid blocking cards work well (just do a bit of research, lots of sham ones out there), it also looks like there's some options for rid blocking phone wallets too.

Yep, though losing your wallet and phone at the same time would be rough.