"Money makes money"
Also in the other hand. Imagine we have two traders:
1. A Rich one who doesn't need to go out and work and eating best foods and having best pillow 
2. A Poor one who needs to go out and work and usually thinking about bills, etc..
Ofcourse, the first one can trade much better than the second one.
I hope all you guys be the first one with a good pillow xD