Crazy that you could ask to borrow someone's android, open a browser, tap your nfc card to their phone to log into your #safebox, tap your sats from their phone to your same nfc card, log out of safebox and leave with your money.
Discussion
don't let anyone borrow your android. It's not safe.
on the plus side someone can use an NFC reader to skim your tag and empty your “safe”box :)