Well, having a physical coin of bitcoin isn't that a bad idea. However, the bitcoin is meant and made to be digital and that was the thing that made it unique compared to all form of currencies. You can always put addresses to the coin but for me, it is just a waste of time and money. Since it will always run with a computer/digital. Indeed, a person will not accept a physical coin until he can verify it online. So the point of having a physical coin is nonsense.
There is nothing that is still not possible, just that it will make no difference from fiat if Bitcoin is created too in hard currency. The fact that fiat has a paper currency doesn’t mean it still does not have its own digital version too, look at gold too, gold is being used physically and still have its own digital form.
If they want to create same system for crypto too, they can, just that the physical crypto will not really function same as the way it functions online, they could just make it two option, this is the only way that Bitcoin can be used globally or accepted globally when it has it’s physical form too, which can be managed very well, even if it has to do with internet.