in interview with Crypto Rich, Boris was talk about partnership with real bank who will issue card. There is record on YT 
I do remember about another partnership which was not named. As for the bank, may be there was such an intension and then it was changed because it is more secure to have own bank.
Could you please clarify which security arguments drove such decision? And also which banks (jurisdiction, tier) were considered / rejected?
and... give us a key from bank's cold wallet
How can they simply provide key to us, they need to follow some measures before giving us update about it. I think the community should wait patiently until we get a proper update from the community.