So in other words, you don't trust any incoming calls, even if they appear to be from a number saved in your contacts?

No. If it's someone I know, and I can tell that's who they are from their voice, and they aren't suddenly trying to pry a bunch of financial information from me, then I trust them. I also don't even accept calls from unknown numbers by default, unless I explicitly turn that off temporarily because I'm expecting a call from someone not in my contacts. There are plenty of other ways to get ahold of me.

AI speech still has some noticeable quirks (I cloned my voice earlier this year to produce some tutorials). Once those are ironed out, I may increase my paranoia a bit. It's going to be hard for an AI faking a relative to get my bank password, if that even happens. There are far more lucrative targets with that level of investment.

I think just being on guard and not trusting potential anonymous sources is "good enough" for now.