[danlivingston]

https://proton.me/support/payment-options

Quote:

You can pay for any Proton subscription with Bitcoin — but it won’t appear as a payment option when you first create your account.

To use Bitcoin, create a free Proton Account, then upgrade to a paid subscription in your account settings.

Quote:

We accept cash payments in US dollars (USD), euros (EUR), or Swiss francs (CHF).

[akimbostrawman]

btc is the opposite of private and anonymous. They do accept cash by mail but not on there main page.