This isn't a habit to me, it's just what you are used to and nothing else.
Just like me, if I open I long/short a position before going to bed, the first thing I do in the morning is to check my phone if my predictions were right or right -loss was hit. It get to time that I dreamed about trading in my sleep, that's your life and its already part of it.
Remember our brain reflects what we do in day when sleeping.