Today, a younger generation of investors is reimagining traditional investing playbooks, creating expansive portfolios that span finance, technology, real estate, sports, and philanthropy. Institute Chairman Mike Milken sits down with two of today’s leading investors, both with decades of running room ahead. How sustainable and scalable are their models? How dependent are their firms’ fortunes on them? Will they come to be viewed as the successors to great investors we’ve come to know, or something different—something even bigger?