[vimax]

You could by a blocking watch that selectively unblocks transactions when authorized. Problem solved.

[chrisdsaldivar]

At that point you may as well just use a smart watch for payments.

[spicybright]

You need to be very close to trigger a read, so you'd pretty much have to take the watch off to scan.

[musingsole]

By that same token, doesn't someone have to get really close to steal it?