Is the graph just the number of internet IPO's in a particular year? Because in the 90's it was much more common to have a smaller-value IPO than it is today.
[edit] The other thing is that a bubble doesn't need to be built on people knowingly selling worthless products. The things people are selling can actually have value, just usually not intrinsic value.
[edit] The other thing is that a bubble doesn't need to be built on people knowingly selling worthless products. The things people are selling can actually have value, just usually not intrinsic value.