Combining your wallet (or credit cards) with your cellphone, is foolish and personally irresponsible.
I understand the idea of consolidation and easy access. But phone snatching is so prevalent these days, because of how mindless phone droning makes people unaware of their surroundings. You’re basically just including your ID, credit cards, etc into one neat little package.
Spread out your loss and theft surface.
the more I separate these, the more screwed I am if I forget one of them and don’t notice. Putting all the items in one place significantly reduces search time and panicking because… e. g. I need to scan a card to enter (but not exit) my house. It’s easy to accidentally leave this card at home when I head out every day, but if it’s in my wallet phone case, then I don’t get locked out as long as I have my phone.