What is the significance of Martha Cratchit being a hatmaker?

Well in my opinion, the significance is that she is trying to support her family finacially even though it pays very little; and that shows how poor the Cratchit family is. I would think she has some friends in the hatmaking buisness so it gives her some joy to be there and away from taking care of her sick brother, Tiny Tim. As a side note, I would think Martha is just a regular teenage girl and likes to sneak out a bit, so sometimes her friends and her tell their parents their off to work while really their hanging out together. This is just my opinion and none of it is based off of fact. hope this helps :)