WD Gann made predictions 1909, calling the market peaks in 1929, 1987, 1991, and 2007. His forecast says 2019 is the ultimate peak of this cycle.
Anybody with that kind of accuracy deserves real consideration.
This book sounds like a really thorough text on futures, including in-depth information about futures spread trades. This book may have some deeper insight that’s worth checking out.
Bernholz reviews every historical incident of hyperinflation and the immediately preceding environment. He identifies 2 conditions that, when met, put countries beyond the point of no return in monetizing their debt.