Right now, I'm ceonyc all over the web. I've so swamped these six letters all over the web, that even the domain name (which I don't have... it belongs to a strop club) doesn't come up in the first few pages of Google. When's the last time you saw that?
So when I saw that ICANN is opening up other types of domain suffixes, it's pretty obvious that, at some point, there will be a .nyc, in which case, I'm calling rights to ceo.nyc right now. So there!
Can I trademark it?