No way am I ever going to carry a financial instrument that uses part of my body as a key.
OH SO VERY AGREED. Anyone who has watched either The 6th Day or Demolition Man already knows exactly why biometrics for security are a very bad idea. Sure, high-end biometric scanners will usually check if the body part is still attached to its rightful owner, but the common criminals won't necessarily know this before hacking off your finger or plucking out your eye. And they might still do it out of spite anyway.
Stop this biometric madness. If you want better security, go down either 2FA, PKI, or some combination of these. Biometrics are going to be painful.