> One difference is most of the companies listed are old, long standing, well-performing businesses. Pets.com had potential, Apple, Amazon, and Google had large amounts of revenue even 3 years ago.

Plenty of old companies spiked in 2000. Companies like Microsoft, Intel, or Cisco. Shovel sellers with a history of decent profits. I mean, the NASDAQ crashed, an it is not all made of start ups. You sound in denial, but there are more similarities than you seem to realise.