I really dont see the legal binding of this currency whatsoever and we shouldnt encourage the physical denomination of bitcoins to say the least because when it is stolen its stolen like any other currency and this will lead to centralization as well.
It's the
inability to steal that requires and leads to ultimate centralization.
I don't understand why people are so hyped about these banknotes. I would rather use a mobile wallet on my Android phone rather than carry such banknote with me all the time.
That's the whole point the notes are for all the
other people, billions of them, who'd like to get into crypto, but can't since setting up and maintaining a wallet is not easy or safe for them, and buying bitcoin is even harder.