Why is OG called OG?

Excuse me, could you elaborate on the origin of the term "OG" and its significance within the cryptocurrency and finance community? I'm curious about how it came to be known by that name and what it represents. Is it an acronym, an abbreviation, or does it have a deeper meaning that ties into the industry's history or culture? Understanding the story behind "OG" would surely enrich my knowledge of this dynamic field.