Head to the door to break money?
Sleep with your head facing the door, which means your head is facing the door. In geomantic omen, the bedside should not face the door, because in geomantic omen, the door is the mouth to receive air, the most active place for air flow, and the place where the air in and out of the whole room. ShaQi and ferocity all rushed into the door. If the bedside is facing the door, it is easy to be washed away by the suffocation, which has a great influence on sleep. Over time, it will seriously affect the owner's fortune.
If the bedside is facing away from the door, it is also a big taboo. In the interpretation of geomantic omen, it is "offending the back", which easily leads to a family status level in which women are strong and men are weak.
Moreover, in Feng Shui, everything pays attention to having a backer, and the bed is no exception. The bedside is against the wall, which makes people feel safe and dependent, meaning that there are nobles to help, and there are backers in work and life.