I am sure almost everyone has an email? address. However, I would suggest that you create an email address exclusively for your domain resources such as the registrar? and host?. Never use your domain?‘s email address as a contact email address with these 2 companies. If there is a problem with your domain, you will not be able to get the problem resolved since you won’t be able to access your domain’s email address.
You do not have to pay for your email address for these 2 resources. You can just as easily use Gmail, and if you are using Chrome, the browser will support multiple accounts as a profile. With that said, there is no reason to not use an email address that is exclusive for the hosting, and registrar.