Is the cooling off phase only in VC funded software companies in the SF area? Or also in Fintech, bio, med, etc? What about NY, London? Also what happened with

Is the cooling off phase only in VC funded software companies in the SF area? Or also in Fintech, bio, med, etc? What about NY, London? Also what happened with public companies that had their IPO just a few months before the Dot-com bubble in March 2000? Are there good books about the Dot-com bubble? What is the outlook for SaaS companies? If there are less VC funded startups, should they focus on enterprise sales?