

Personally I’ve been meaning to jump ship to Ubuntu Touch (yes, it’s still being developed) which seems to be working relatively well. I still would need to keep a separate throwaway phone for online banking, though, since AFAIK the banking apps struggle running on virtualized android.
If you decide to do that I recommend taking the battery out first, if the phone can boot without it. Phones have a tendency of mismanaging their batteries to the extent they turn into spicy pillows relatively quickly, if you just leave it plugged in and use it remotely.
My main source for this is an LTT rant from back in the day, but I don’t really have a reason to not believe that based on experience.