From a distance, the world's largest bitcoin exchange looked like a towering instance of renegade entrepreneurism. But on the inside, according to some who were there, Mt. Gox was a messy combination of poor management, neglect, and raw inexperience.Its collapse into bankruptcy last week and the disappearance of $460 million, apparently stolen by hackers, and another $27.4 billion missing from its bank accounts came as little surprise to multitude who had knowledge of the Tokyo-based company's inner workings.