Which one would be the best approach to email signups?

I'm trying to organize some stuff, especially accounts on the inernet and I'm thinking of two approaches when it comes to signing up online using my email.

Approach 1:
Supposing that my name is John Doe. Would it be safe having an email doejohn@gmail.com if John Doe is not a common name?
Making use of that email for official communications, government, job applications and banks. I should not care that much about giving my real email to banks and officials. …

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