Facebook is currently preparing for what is believed will be the biggest initial public offering ever for an Internet-based company. But while Wall Street sees a bright future for Mark Zuckerberg’s social network, a surprisingly high percentage of the American don’t see Facebook as a good bet.

An Associated Press-CNBC poll asked 1,004 adults if Facebook’s appeal would linger or fade. Forty-six percent answered that Facebook will go the way of MySpace or Friendster, whereas 43 percent said it had staying power.

Perhaps more surprisingly, there was even more skepticism about Facebook’s future among those ages 18-to-34, who use the social network more than older adults. Fifty-one percent of that demographic expect Facebook to fade away and only 44 percent think it will prove to be more than just a fad.

[Chicago Tribune]