There are always several reaons a person might not be selling. It could be titles, tags, photos, lack of adequate descriptions, unclear policies, lack of inventory, etc.
It takes a long time to get noticed on Etsy even if your shop is polished and organized to the nines.
If your work schedule is not permitting you to add new items or keep up your shop, then go ahead and deactivate your items (that way you still have to option of re-activating if you change your mind, but your items can still expire while deactivated).
Even if you close down shop, you can still be part of the Etsy community by adding favorites, creating treasuries and sharing your thoughts in forums and teams!