That depends on what want to do. Photoshop CC has many, many powerful features that are not in Photoshop Elements. That said, Elements still has plenty of useful features. This page, while a bit out of date, does a good job comparing features in the various offerings.
You might try downloading the Photoshop CC trial and running through the Edit your first photo videos, which will show you many of the powerful features in Photoshop CC.
Product Integration Manager, Creative Cloud Learning & Training