That's an ideal. You have to be reasonable with the expectation that people are going to want to use their card in places where it isn't securely convenient to

That's an ideal. You have to be reasonable with the expectation that people are going to want to use their card in places where it isn't securely convenient to do so. Otherwise, you will end up creating a niche with no mass market appeal, and there's really no point in developing out infrastructure unless you're replacing the old one completely. Again, credit cards exist for convenience. If it's security you're aiming for, you're targeting the wrong market.