There is a well written post by Greg Linden predicting the upcoming crash of 2008. The problem is that Greg is “all wet” on this. His post is laced flawed assumptions. There are bubble tendencies but we are not fully in a bubble. You have to be in a bubble for the bubble to pop. All the leading indicators in tech show expansion not crash.
Advertising spend is increasing online – will expand the market
Modern Web Infrastructure is evolving – real opportunities for viable companies
Global communications and collaboration – lower costs to operate a business
New targeting based infrastructures (eg social networks) – increase targeting capability for advertisers
I’ve lived through a few cycles and we are on the upswing in technology ventures across the board.
Bubble indicator: I would start getting nervous when you see more rollups in sectors combined with a viable liquidity market.