Honestly I wing the term physical crypto around a lot and it includes any DIY coins as well. I think we can sub label to people who know what the hell we are even talking about but to people that dont I just reference the coin/note/ etc as a physical crypto product if it is loaded/assembled but not loaded/ or it can be assembled by someone.
Yes not any piece of paper with a 1BTC on it would represent a physical crypto product but if someone asks me what one of my peeled cas coins are I simply say a physical crypto coin. Right or wrong that's my terminology of them
The concept of "loading" or having the coin not "loaded" is a hard concept to draw for people who don't know anything about the basics of how to hold a digital Bitcoin/any other crypto.
It's a slippery slope to the conversation forcing you to explain the basic concepts to those people... however in your situation about the peeled Cas or any other coin that isn't "loaded" by a mechanism of tamper evident protection, I say those coins/notes/whatever are
collectibles... when it comes to a loaded note coin/note/etc. it's a
"physical" BTC/cyrpto coin,etc.
I think a peeled cas coin would def be a collectable and a "physical bitcoin" but im not sure id consider just a gold coin that never held any bitcoin a physical bitcoin but def a collectable and cool as well
* So basically I consider a physical bitcoin a coin that is holding or has or is capable of holding
bitcoin can be considered a physical bitcoin