Recently, I was stumbled upon
99bitcoins.com & found these interesting
Bitcoin Obituaries. It's in fact a record of how many times people forecasted the end of bitcoin and the official count is 432 up until now. There are thousands more which we have no record of but this has the record. The interesting part is that in the following graph you can get the source where someone has forecasted the death/end of bitcoin. It's pretty cool; I have read a few from long ago. There are some more interesting stats you may enjoy. Don't forget to have a click on the page.

Source-
99bitcoins.com