Who is the number one camera in the world?

I'm curious, could you elaborate on the term "number one camera in the world"? Is it based on sales figures, technical specifications, or user reviews? Also, is this a subjective opinion or an objective ranking? Given the rapid advancements in camera technology, it's intriguing to know the criteria used to determine such a ranking. Additionally, are we considering cameras for specific purposes like photography, videography, or both? It would be helpful to have a clearer understanding of the context before providing an answer.