In fact, Proton Mail is not secure and not completely private.

When you send email to a non-Proton email address, the email has no security at all.

There is only some security when you send email from proton to another email from proton.

And even so, it is not a guarantee of security, because there are reports of password leaks and also of having handed over data to the government.

Therefore, Proton is not exactly a safe platform, as it will be facing the State.

The only advantage is if you can create an email with fake data and pay with cryptocurrency. Then yes, you can escape the state spotlight, which even in possession of the data, will find it difficult to locate you, if you use a vpn or tor to access your account.