[thewataccount]

At least in my experience you would only encrypt the fields that are sensitive.

So of course anything related to payments, possibly emails/ips, that type of stuff.

In a lot of services you don't usually need to refer to these fields except on the settings pages and possibly a checkout page, things like that. So the Username, preferences, and content of your site will likely be unencrypted.

Because you can avoid using those types of fields on most pageloads/api calls it should have minimal impact, especially since those places often include using an external api you have to wait for anyway (email, checkout, etc).