Where does ChatGPT get data from?

I'm curious to know, where does ChatGPT derive its vast trove of data from? Is it sourced from a single, comprehensive database, or is it a meticulous compilation of various online sources? Additionally, how does ChatGPT ensure the accuracy and relevance of the information it presents, especially in the ever-evolving realm of cryptocurrency and finance? I'm intrigued by the intricacies of its data acquisition process and the measures it takes to maintain its credibility in such a dynamic field.