Why is this being downvoted? Besides the "reliable" typo geezer makes a good point. Cash doesn't require electricity, or run out of batteries, or require an Internet connection, nor can it be cracked/hacked/etc. From a pure usability standpoint, cash would seem to be the more convenient option.
(I'd rather be robbed of my wallet than forced to make large transactions out of my Networked bank account.)
I don't know how the US-designed versions of NFC work, but the NFC (mobile suica train pass/7-11 nanaco/yodobashi point card) on my Japanese phone works even if the battery is removed completely.
(I'd rather be robbed of my wallet than forced to make large transactions out of my Networked bank account.)