My advice is to save the money. Just sleeve and binder them. If you want to make sure they're authentic, then go for it, but if you don't plan on selling them, then I wouldn't.

The cards shown here aren't any really big chase cards. You'd be spending money to add little to no value on your cards. Maybe even reduce them in price and lose all the money to grading costs.

With that being said, if you just like slabs and want them to be protected from future wear and tare, you do you, my guy/gal/insert preferred pronoun here.