I was talking with some professional colleagues the other day. These are smart people - very educated, with graduate degrees. I don't believe any of it. I don't worry about this stuff. The government will fix it - they have to.
Denial is a common psychological response to impending uncontrollable disaster.
The most common example of this is when a person is told that they have a terminal illness. Elisabeth Kubler-Ross studied dying people for years, and developed five stages that people go through. Only when the person accepts the reality of the impending event can he or she start dealing with it effectively. I would say yes. You don't have to be a survivalist, sell your house, and build a bomb shelter with submachine guns to be taking the Y2K seriously.