Why is Gemini two?

I'm curious, why does the popular cryptocurrency exchange Gemini identify itself as "two"? Is there a specific reason behind this branding, perhaps a nod to its unique dual-currency approach or perhaps a reflection of some underlying technological aspect of its operations? As a user and enthusiast of cryptocurrency, I'm eager to understand the rationale behind this seemingly simple yet intriguing numerical designation. Can you enlighten me on the significance of Gemini being "two"?