So If I understand correctly this is just a paper wallet with nice custom design, right?
I think it would be better if keys are encrypted in some way.
I think this would be a good time to create something as a joke for new EURO banknotes, because they started contest recently and they accepting designs.
There are a bunch of funny AI generated images posted on twitter

This is actually the red envelope in which the paper wallet goes in, and funny enough i already did a design of Euro but with Bitcoin twist for a paper wallet