Not pro monopoly as such, but in the recently posted article on UK shipbuilding they mentioned that a major reason for it's decline was it didn't build out capital capacity after being repeatedly burned by cyclical nature of the industry, with some quote even claiming they thought they would be best positioned for the next bust explicitly.

What choice do these companies have, even assuming the demand doesn't crash? They can build out and cause a glut in a few years. They can not build out and then what? Barriers to entry are high but not insurmountable; long term they'll go the way of UK shipbuilding. It might take a while, though. Also one defector building out would have massive advantage, so it doesn't seem like a stable equilibrium. See also constant bickering in the OPEC, an explicit cartel.