The only problem was that it was all fictional. Having your portfolio worth a million dollars now is useless when it's only worth $2000 when you go to sell. Getting six-figure salaries at a dot-com when you just have six months HTML experience is kinda ridiculous (okay, we have a variant of this today as well).
In many ways, this boom is a lot more honest, and a lot more real. It has winners and losers, many (but not all) of the winners put in years of hard work to get there, and people generally have a sense of where they stand. The problem is that there are far more losers than winners. That doesn't make for a positive mood, or a stable society.