The topic could be broad, but need to connect Elon and the global economy. 
For example, How do Elon Musk’s companies impact the whole world economy? What are the advantage and disadvantages? Academic content:The companies that he builtsWhat are each of the companies is aboutHow will the companies impact the whole worldThe reading list was broad, it covers the different fieldIt can show what is the future trendsThe influence that Elon bringsThe research did not only cover his companies, it also cover his influence, future trends, Virtual currency, Cryptocurrency, and even Web 3.0. 
Please let me know if you got further questions.