What's the point of hanging five coppers in front of the door? (High score) (Detailed)

This is a matter of feng shui. Generally, the five emperors' copper coins will be hung on the door, and the sword hanging in the kitchen facing west will be opened by the kitchen door beyond that side. It doesn't matter if it faces east, but it's not good to face north. That's the "northern ghost prison gate". It's too old to talk about geomantic omen, so you will use peach wooden swords to resolve evil spirits. Don't take it too seriously, it's all psychological hints. If you believe this, find someone to look at it. If you don't believe, nothing will happen. This kind of thing just keeps you safe.