Buying things in bulk is definitely preferable if you don’t want to have to keep running to the store every time you need something. It’s not especially smart to purchase perishable foods in large bulk amounts, but most other items you purchase in bulk will result in discounts, lower prices, and more peace of mind.
It’s nice to know that you’re nowhere close to running out of something that’s useful to you. One of my more recent bulk purchases was a purchase of bulk outboard motor oil for my boat. I’m really happy to have all that oil easily accessible to me and I’m glad I won’t have to run out for more oil anytime soon.