Just as it is safer to use a different password for each account, it is also safer to use a different email and user-name for each account. This applies to all online accounts, and not just cryptocurrency accounts.

Its better to create email for each account. Don't keep all eggs in one basket. And use really strong passwords with 16+ characters using low and up case and 0-9 with special symbols. Dont keep passwords in one doc or save it in encrypted archive or something else. And better to do it on usb without any information on your pc

Use different email for each acc