Physical Bitcoins don't necessarily have a value, unless there is a wallet stored on the coin. Otherwise, why don't I go make a bunch of copper physical Bitcoins, and sell them for $600? See where I'm going with this?
Physical coins are just for show, unless you have an urge to print out a copy of your wallet onto paper.
There's a fairly good market for these coins as collectors items though.
I would agree it's more of a collectors item. Some made of certain things silver/gold yes do have value on their own.
They are a cool item you could put your key in and put in a safety deposit box or something. But most likely you will be better off keeping coin "mint" as it seems to be collector's items.