Would it be in the realm of possibility to create a coin with a qr code on it? Like laser etched?
I am thinking it would be cool to be able to have coins like int he amounts of 5, 10, 20, 50 & 100 with their own individual qr codes.
Then have a wallet that allows me to deposit the amount associated to that coin onto that qr code.
Then you could spend them like cash.

I mean I know there are some things wrong with this like change and what not.

But I just think that paper wallets are easily destroyed, like if you left it in your pants pocket and washed it.
Where as a coin is solid.

Unless they already have these, then forget I said anything