Washing your hands frequently is being taught to us even as children to keep us from getting germs and later illnesses. We need to make it a habit since germs can be easily transmitted through contaminated water, contaminated food, germs in the mobile phones, touching dirty things, through other people with colds and cough, and many other ways.
If you are working, you are more vulnerable to germs if your work requires you to handle money. It is best that you always wash your hands frequently before eating, during breaks, and at the end of working hours.
There is no harm in doing what is best for our health, learn the habit.