Why are some subsectors weirdly categorized?

examples rost and tjx are considered apparel retail. when they are clearly discounters… or sherwin williams a chemicals co when clearly it is a retail home improvement store.

Or fiat currency, when it’s obviously a ponzi scheme

how? fiat currency doesnt promise you any type of return. its meant to be transactional!

It promises to hold its value. Hold my bitcoin

lol no it doesnt. inflations been around for a long time. you lose like 90% of the value within 80 years.