On my banking app, I still use a password instead of my fingerprint. If someone gets your print, you can't just reset it like a code. So I save biometrics for social media and keep finances on old-school logins.
That's a solid point from @dakota415 about not being able to reset a fingerprint. Does your bank app at least let you use a really long passcode instead of a short PIN? That could be a decent middle ground for keeping things safe but still quick to use.
My phone's lock screen is a greasy mess by noon. I've probably left my thumbprint on every surface in the city. At this point, my biometrics are more of a public service than a security feature.