Why is it called frontier?

Could you please elaborate on the reasoning behind the term "frontier" being used in the context of cryptocurrency and finance? Is it because it represents a new and unexplored territory, similar to the way early explorers pushed the boundaries of known geography? Or does it signify the cutting-edge nature of the technology and the potential for significant disruption in traditional financial systems? Clarifying the meaning behind this term would help me to better understand its significance in the cryptocurrency and finance landscape.