The new cryptocurrency gold rush: digital tokens that raise millions in minutes   New York City About a dozen rain-soaked people were crammed between the revolving doors and security barriers in the lobby of New York University’s Stern School of Business as torrents pelted down outside. All desperately wanted in to the hottest ticket in town, one that promised to make some of them overnight millionaires, if not billionaires. Among them was Dan Morehead, a former Wall Street titan turned…