I only ever use cash for the local takeaway that doesn't take card.
Other than that, I use my phone to pay for virtually everything. It fingerprint authenticates my payment, so even if my phone was stolen, I know the chance of fraud is low. In theory, I can pay up to £10,000 with a fingerprint or other cardholder verification on a mobile device, at least in the UK, although most stores are limited to £250 or £500.
Bring on the death of cash, I am more than happy to see it go.