In securing our account in someone trying to access your personal information The best actions we will do to secure our accounts are we must wise notify and alert and change your password immediately.
Do not share your personal information or (OTP) to anyone else even your close friends to avoid vulnerable scenario on your account.
Being stricted is highly recommended to Secured.
You are talking about securing which account? An email account, facebook account, or bank account?
Security is highly depends on what kind of account is this, if someone tried to hack your account then first you need to do is to contact the bank officials and freeze all the transactions and if it is bitcoin wallet then just create a new wallet then move all the funds on chain, don't just import it.