It's common in London, phones are being stolen for the access to financial accounts, not the value of the phone itself. They steal the phone out of your hands while it is unlocked. For example:
https://www.bbc.com/news/articles/cy8y70pvz92o.amp
I'm not sure exactly how they get around security features, perhaps by social engineering customer support, if they have enough PII.
Uhm yeah in order to actually wire money in my banking app I need to input a fingerprint. Smart people developed these apps banks are not stupid.
Obviously people can still kidnap you and torture you but that's no different from before smartphones.
Maybe if it's a random Android phone with Cash App