What is the Securities & Exchange Commission (SEC)?
Could you please elaborate on the role and function of the Securities and Exchange Commission (SEC) in the realm of finance and cryptocurrency? As a regulatory body, how does it impact the market, investors, and the overall landscape of financial transactions? What are some of the key regulatory mandates it enforces to ensure fair and transparent markets? How does it keep up with the rapidly evolving field of cryptocurrency and blockchain technology? And finally, what are some of the challenges the SEC faces in its regulatory efforts, especially in today's digitalized world?