Not a good idea.... We had a biometric scanner system linked to our payroll system... you clock in and out with a finger print scanner.. but some of the guys { those who did handyman jobs and work
with their hands a lot } had problems with the system not recognizing their fingerprints. The other problem --> People will know that your finger print is the way to access your money and they would
simply force you, with violence to give up your money.. A password memorized and written down as a backup in a safe place, will never be trumped by Biometrics.

there are circumstances that would affect your fingerprint even though its unique but there are factors would definitely change that as you said especially to those handyman jobs. I do experience that situation where biometrics have that problem on have a hard time on recognizing those fingerprints and some have already registered already.