While it is difficult to imagine how these banknotes will go as a means of payment, but how they can be used as bonds. The organization that issued them should guarantee their redemption at par value in the case of presentation for payment. At the same time, bitcoin, as everyone expects, should increase substantially in price. This makes it possible to use them in this capacity, than simply as a payment method for mutual settlements and we see that new forms of application of crypto-currency are being created
It would definitely be possible to use Bitcoin "banknotes" in this way, as bonds, but personally, I don't see a lot of purpose in that, especially when you can just keep your bitcoins on the blockchain while the keys to your coins in some safe place outside it. Really, what if this device fails or malfunctions due to natural wear and tear (or because of some other reason), what are going to do with it then, throw it away? Bonds as they are bring you interest, but what kind of interest these devices are going to give you? There's none, so they are pretty useless in this field of application. Apart from that, you don't need redemption as you can "redeem" the bitcoins in this device yourself.
These thingies are basically a hardware wallet (like Opendime sticks).