Why did no one see it [the crisis] coming?

I was under the impression that lots of people saw this coming. Obviously as credit and loans are used more and more eventually it has to reach a limit. I personally had no reason to believe it would happen when it did, but over the years I've heard a lot of people warning of an economic collapse, especially with reference to the housing market. Of course there were people that vehemently denied it, but that will always be the case.

Am I the only one that thinks we DID see it coming?

Seeing as most of our society is divided into specialised jobs, perhaps there should be positions for some individuals who are jack of all traders but masters of none.