Think back the South Sea Bubble, the Roaring 20s, Computers in the 1960s, the Internet in the 1990s. There is a marvelous book called Manias, Panics, and Crashes: A History of Financial Crises that I highly recommend. Had many investors read it, its doubtful that so many would have lost substantial portions of their net worth in the tech meltdown.
As Santayana said, Those who dont know history are doomed to repeat it. We couldnt have said it better ourselves.

