Sounds like great advice if you are interested in developing coronary heart disease, impaired cognitive ability, and a host of other health-related issues.

http://www.ucl.ac.uk/news/news-articles/1005/10051205

http://www.circadian.com/blog/item/22-5-negative-effects-of-...

Oh, and do you literally expect a "great" entrepreneur to work 24/7? Good luck with that. https://www.scientificamerican.com/article/how-long-can-huma...