Email purposes

I'm wondering whether using Gmail or ProtonMail for the following purposes

\- Bank accounts/Paypal/anything else related to money

\- Steam/Epic Games/GOG/other Games/etc

\- Instagram/Reddit/Facebook/etc

and much more

While ProtonMail offers privacy and protection, it isn't as easy and intuitive or flexible as Gmail. Moreover, a few (or maybe many) of the services I use doesn't support ProtonMail.

What should I do? Should I use Gmail for this and ProtonMail for that, or should I use only one?

accounts bank email epic epic games etc facebook games gmail instagram isn money paypal privacy protection protonmail reddit services steam support