What is the rarest rare cat?

Could you please clarify what you mean by "rarest rare cat"? Are we referring to a specific breed of feline that is exceptionally uncommon, or perhaps a unique individual cat that holds a special distinction? If it's the latter, what criteria are we using to determine its rarity? Is it based on its genetics, physical appearance, or perhaps some other factor? Additionally, could you provide some context for this question? Are you asking in the context of pet ownership, cryptocurrency, or some other area?