I just have an old phone for all the banking stuff. And I use degoogled phones for real stuff. I don't need my bank when I'm out anyway.
Not using grapheneos though because pixels are expensive in my country. Also, I disagree with them on some points, like rooting. I don't think me having access to root makes my phone less secure. Obviously it should be secured properly so only I can use it, but that can be done. After all even an unrooted phone still has a root account and runs stuff as root, you just can't access it as a user. That means the OS vendor (grapheneos in this case) has more access rights on my phone than me (how else are they going to install updates), to me that's not right.
I just want to be able to inspect what is going on on my phone. What apps are storing about me on their private storage, and to be able to add root CAs so I can MITM their traffic to inspect it.