4) It's offline, and works in the absence of electric power. Even if you're in a tiny village deep in the middle of the Amazon forest, you can still pay for things with cash.
it's also useful when power is cut, for example in case of natural disaster (I just saw today a video on Waffle House, where their disaster playbook mentioned just that)
4) It's offline, and works in the absence of electric power. Even if you're in a tiny village deep in the middle of the Amazon forest, you can still pay for things with cash.