I've been a nostr:npub1mea2vwcu06qf7e4x00wd902vj54qnn2jacq76ldntrgfhtvhlpqqrvqane user for a long time and this is good overall. Proton takes security very seriously.
But I'd rather use by own password manager in my nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll than somebody else's password manager.