Hey thanks for referencing our project here @deveerei, we appreciate it. This one is definitely pretty cool too, albeit a bit different, so you would need to use a different minting process.
I'd like to weigh in on your discussion regarding adding a crypto value to a coin, it can certainly be done, depening on the keys associated with each currency, for example if the coin had a QR code to private keys for a steem account/wallet it would be simple enough, but then each one would have the be different.
There are additional potential legal problems with this as many countries have strict laws about creating of "physical currency" and with the new legal scrutiny around cryptocurrencies in general it's was to proceed with caution.
I'm not familiar with how coins are minted, didn't know there were different process depending on the materials and design. I haven't joined our field trip to the bank minting coins when I was in grade school haha.
I just find it cool that some currencies like bitcoin can be added physically into a real coin. Didn't know about the legal process and stuff like that. It's just cool, especially for gifts or souvenirs.
I wanted to buy your coin but I didn't have means. (Never really bought anything outside the country).