Unstoppable: Siggi B. Wilzig’s Astonishing Journey from Auschwitz Survivor and Penniless Immigrant to Wall Street Legend by Joshua M. Greene (foreword by Deborah Lipstadt); San Rafael, California: Insight Editions © 2021; ISBN 9781647-222154; 315 pages including appendices, acknowledgments, bibliography and notes; $29.99 SAN DIEGO – Before I tell you how Siggi Wilzig became a “Wall Street legend,” let me tell you about the kind of jobs he had after immigrating to the United States as a survivor of Auschwitz. His first job was shoveling snow for $2 a day. On the second day, he found two neighbo…