Protonmail has a BTC wallet?!
Yup it's Bitcoin-only Layer-1-only tied to your email.
So now all I need is your email and I can see all your transactions. They claim it makes a new address, but this...
Just one point of clarification, they *do* let you use/upload your own gpg key for email. It may only be for higher/paid tiers, but I'm using my own locally-generated gpg key with their services.