A crypto wallet is a handful of bytes. Perhaps a string of words if you are using passphrases as mnemonics. Where does that exist? A bank or exchange does have a physical location and would exist somewhere, but a crypto wallet really has no defined location unless specifically being held in a defined place on a defined server as per business rules. Its like saying "you cannot leave South Africa because your body is worth, like, um 50,000 USD in harvested organs..."