I have no sleep pattern, haven't for about a decade (little less, really). Sometimes I'll lay down for 20 hours and sleep a good portion of that, sometimes I'll be up for 48 with barely a wink. If someone were to ask me how much I sleep in a given 24-hour period, my answer would be "somewhere between 2 minutes and 20 hours, depending". If asked for an average, I have no answer. Thankfully, that makes me perfect for erratic, last-minute work schedules, which is quite lucrative in the US these days (as jobs outside of investing go).