If citibank was truly "evil genius' like in Star Wars they would make the citicoin in the following manner imho
1) It would be sha256 and a POW coin and completely OPEN SOURCE just like Bitcoin ...(your pushing the coin for your bank and the name so deal with it)
If they did such most folk would go WTF and at least look at your coin
2) Reason to make it sha-256 is obvious ..if you did so with all the old sha-256 stuff out there you'd get QUITE!!!! the leg up so to speak
3) NO PRE-MINE a set amount of coins say no more then Bitcoin would be how I would do it and the POW mining starts at such and such a date
and time from diff 0 ...and off to the races
So again IMHO this is the ONLY WAY a bank could get enough traction on all this to get ANY KIND of legitimacy for a COIN ...and making it POW and
Sha-256 to say you'd have the good will of the old sha-256 miner crowd would be an understatement
Also as such it would do all the transaction action of the block chain technology Citi-Bank says it wants to tap into
Hell I'd have a hard time not dragging out my old Sha-256 KNC 550gh Jupiter if such conditions were the case
BUT BEFORE FOLK YELL AT ME FOR SELLING OUT ...NOTE: THIS WILL NEVER EVER HAPPEN.......THE HEAT DEATH OF THE UNIVERSE WILL ARRIVE FIRST!!!!
NO WAY can a place like Citi-Group do something like this without some kind of control or angle ...the group think would simply not allow such ..they would
have to have a way to justify it to their bosses as the way to play this and of course the bosses would say 'why not just use bitcoin'
BUT this is the only way again imho you could act as a disruptive force in crypto imho ..if such was LEGIT NEWBIES and other folk would say hey its a bank
its open source its not that evil bitcoin the press keeps spreading FUD about..I've heard bad things about bitcoin etc what the heck I will dabble in citi-coin
Anyway the old microsoft topic with windows ..copy apple's mac O/S and make a borderline crummier version and push it because you have the market share
to pull it off and cross your fingers again it would be the only angle that would work for large scale use of your coin outside of your bank etc imho
AGAIN IT WON'T EVER HAPPEN ..in corporate culture you could never give up that much control to do such...but if you wanted to take a part of bitcoin's lunch
that imho would be the only shot you'd have .....releasing as a bank like them their own coin...you'd have no other angle no one would/could take you serious
with any less again imho
Anyway it is a lot like the Zombie Apocalypse ...this will not happen ..but fun to speculate about