No, its not worth it. All it does is encrypt data to and from the site, and I only recommend using SSL for sites that deal with personal information like bank details and addresses.
Like on my Store, the only pages that have SSL are the ones that deal with credit cards and bank information.
You can use cloudflare and use their SSL.
but SSL is known to slow down sites.
What is your site about ?
What are you running (like Wordpress, Joomla, Drupal...) ?