Sleeping in the nude just seems too dangerous. The 'what if' scenarios go on and on- accidents statistically have to happen to to
someone. Trying to climb out my window while nude to escape the fire is just not the way I want to start my day.
That being said I don't like wearing much clothing when I go to bed. Maybe once I become rich beyond belief I'll have money to spend on clothing to wear only while asleep, but for now I wear t-shirts and, if it's cold, baggy shorts of some kind.