[higherpurpose]

This is why Apple's iBeacon was never going to be a viable method of payment, unlike NFC. The range on Bluetooth is just too long to safely do something like payments with it.

[drdaeman]

The range of Internet is incomparably greater, but we still somehow manage to perform payments over that in a reasonably secure manner.

We just have to establish the secure channel and securely authenticate peers to each other. The medium over which this is made is mostly irrelevant.