I tried a MagSafe, but even with just 3 cards it made my iPhone way too bulky.
Since I “never” use cash I don’t really need a wallet, but I do need something to carry a few cards (identity, credit, bank, insurance, and public transport). I decided to go for a (cheap) minimal wallet (holding those cards - plus a euro biljet that’s in there since day one) and am pretty happy with it.