Why is halloween big buisness

It is business because it is a source of earning money

Explanation:

Halloween is the second-largest commercial holiday, with Christmas being the first. Overall Halloween spending is expected very higher because people use to spend money for making paintings on their faces and act like horror characters. People make haunted houses, haunted places and many more costumes that do not require much expense but the attraction of people towards these places is comparatively high. Same like other festivals, Halloween is also considered as one of the most significant party gathering that is why is a source of earning money too for business class.

cuz its fun to collect candy i guess?