Even how many security levels that you put into your account or even your email address if you didn't care about it, it's useless.  As long as you've used an email address that's not associated with your personal and daily use account, then, you'll be fine.  If you're the only one who knows your password and your email address used, you're safe from a possible scam or being a compromised account.

Threat your account as you valuable stuff and avoid it sharing with anyone.
I'm on this rank now but I never change my password even at once or email the address because I know that I'm the only one who uses it 'till now.

I suspected that this was probably a cause of sharing an account or might use it as collateral in exchange for something valuable than this, IMO, and CMIIW.