a number of people were prosecuted:
https://www.google.com/search?client=ubuntu&channel=fs&q=wor...
the dotcom 1.0 crash had a lot of irrational exuberance, where VC money was raised and pissed away for ideas that wouldn't work at the time (beenz, flooz, pets.com, webvan, etc). Then there was the outright fraud like Enron and Worldcom.