If you are serious about your site and it's up time it is a must to have service for every WP site because millions of sites are getting hacked everyday . So prevention is always better than cure .
1) Complete audit of your WordPress site and closing of all backdoors to prevent hacking
2) Hardening of WordPress to lock brute force attacks
3) Complete protection of login page with Captcha
4) Installation and configuration of WordPress security plugins to lock out invalid users and IP
5) Configuration of automatic periodic back up.
After completion of the above 100% peace of mind from hacking is assured .