I asked the same question,
It is for receiving only.
thanks!
Yes.
I do assume since these will be programmable. So you may be able to modify the Nfc to contain a private key, but that would be highly not recommended.
looks interesting.
But I still didn't understand how can you spend the bitcoin from the addresses.
It has any QR code at the back or something?
Overall the idea of creating something like that is awesome, and I guess that you will have some success doing it.
These are receive addresses on the card. You spend them from another device...
I guess you should consider this a paper wallet/cold storage, right?
Depends on how well the private key was generated you can put any public key on the.