This wipe out process was designed to make sure that the bitcoin in the private key was still there,(if it has been transfered, the device will indicate it by shown that i have no private key)
And i think the physical coin was used by transfer it, just like ordinary physical coin. Instead of transfer bitcoin in the private key, we just transfer the private key.
The purpose of physical coin was to promote the recognition and acceptance of bitcoin to public, who might be more familiar with physical coins.
After wipe out, maybe generating another private key and shown the new address? Which can make it re-mintable
And i think the physical coin was used by transfer it, just like ordinary physical coin. Instead of transfer bitcoin in the private key, we just transfer the private key.
The purpose of physical coin was to promote the recognition and acceptance of bitcoin to public, who might be more familiar with physical coins.
After wipe out, maybe generating another private key and shown the new address? Which can make it re-mintable
Once again, you said a device. There might be a chance that It's not well protected and private key are not really deleted as should be (or they are sent to a server) and If it is that secure, It could cost a lot more then It should be (say a wallet that contains 0.1 BTC could cost like 0.15 BTC in that case). I believe It's really not worth it and whoever want to continue with devices should simply use hardware wallets and continue to trade these online.
You might be right, since I have not yet calculate the hardware requirement for that.
I do have some experience of programing MCU, but i am not familiar of bitcoin private key generation and transaction things.
It would take me some time to go through these
