Proton VPN, Proton Email, Proton Wallet, etc... I don't like the idea of creating multiple privacy-oriented apps and centralizing them under the same company/management. That's what Mullvad does recently too and I don't like it.
Agreed, proton is reputable company in general but their wallet is
still from the class of custodial ones in which users don't posses keys to their keys to their stash should they confided it by inmost soul to proton wallet thus they may be hooked at any moment. Email service is one thing
(though an important one), wallet with money is another