Fingerprints should not be used for biometrics. Period.
Using fingerprints and allowing a third-party to have access to that registration data and tracking information is unacceptable. Once you give this data to the government or big business, it will NEVER be erased or restricted, regardless of claims or laws- it will go into huge databases and shared between entities and agencies and used however they want for as long as they want.
There is only one safer and practical biometric I know of- that is deep vein palm scan. That registration data cannot be readily abused. It can't be latently collected like DNA, fingerprints, and face recognition can. You have to know you are registering/enrolling when it happens. You don't leave evidence of it all over the place. When you go to use it, you know you are using it every time. And on top of all that, it is accurate, fast, reliable, unchanging, live-sensing, and cheap. If you must participate in a biometric, this is the one you should insist on using.
This technology could be put in portable devices like phones by simply including an IR camera. It won't be as fast/small/close as using fingerprints, so it won't be as convenient. But safety, privacy, and security are diametrically opposed to convenience.... it is worth it.