For most of us, living in a penthouse in Manhattan overlooking Central Park is an Impossible Dream, something that happens only in movies and fairy tales, not in real life. But for some, it’s not an impossible dream at all, but quite an achievable milestone, or something to check off a bucket list. How else would New York City end up with something called ‘Billionaires’ Row,’ a cluster of supertall residential skyscrapers lining 57th Street next to Central Park?