Equally good luck running any bitcoin services in the lightnet. We can all see how little luck and sliding down slippery slopes to oblivion that system has, on a monthly, if not weekly basis.
There are plenty of successful businesses operating on the open side of the web.
That many users continue to tolerate failures like Mt.Gox is just a sign of how immature the market still is. There will be many successful ventures that fully conform to regulation. And any business restricting itself to operation on the darknet is limiting itself to an extremely small segment of the user base.