Yelli posted this picture in the blog comments:
(embedded picture didn't work for some reason.)
What is that I see on the lower right? Railroad bubble! Ha ha!
There was also a radio bubble much like the internet bubble. In fact I heard a story on NPR about the radio bubble just before the internet bubble burst.
"Radio Flyer" was named after the hot, hot business sectors of radio and airplanes. It was a children's toy wagon.
Sort of like how the iCup is a coffee maker that has nothing to do with the internet.
As long as there are markets there will be bubbles