I have a few physical coins.
Do it your self kits where you have to put the privat key below the hologram sticker.
Like this coin
https://bitcointalk.org/index.php?topic=2551453.0I could print on small papir but can I read the key in some years if printed on paper. Maybe it is not even me own the coin when to use the bitcoin.
How do you print a privat key for long term durability?
It has to be so small it can be below the sticker
![Shocked](https://bitcointalk.org/Smileys/default/shocked.gif)