It also costs money to make money. Minting coins isn't free: you need the right cupronickel mix or whatever they're using so that the coin matches specifications. This is an industrial process like any other.

Also not all of the countries ask the mint to actually mint. They're buying "flans" i.e. coin shaped metal that hasn't been struck yet, just prepared according to spec. They strike the coins themselves.

As others have noted I think it really also depends what your domestic situation is, i.e. can the whole process be done in a cost effective and safe way where you are? If not... This is just the cloud but for country tokens ;)