What is the net worth of a GRT owner?

Could you please clarify for me what exactly is meant by the term "net worth" in the context of a GRT owner? Is it referring to the total value of the GRT tokens held by an individual or is it a more comprehensive assessment that includes other financial assets and liabilities? Also, how does one typically calculate the net worth of a GRT owner? Is there a standard formula or methodology that is commonly used? Furthermore, are there any specific factors that can significantly affect the net worth of a GRT owner, such as the current market price of GRT, the number of tokens held, or perhaps even external economic conditions? Lastly, is there any reliable source or platform where one can find accurate and up-to-date information on the net worth of GRT owners? Thank you for your assistance in helping me understand this concept better.