Not forgetting the eco loonies predicting the end of the world in 12 years, so that would be 2031. Not sure the Dow can wait that long though.List of dates predicted for "The Apocalypse".
Wikipedia lists 205 documented events, 184 were in the past and so were verifiably wrong, but hey 185th time lucky...
I'm sure this site has at least that many predictions of the end of The Dow's Bull run, and for over 100 years all of those have been proved wrong, but lets not stop guessing.
66–70 Simon bar Giora, Jewish Essenes The Jewish Essene sect of ascetics saw the Jewish uprising against the Romans in 66–70 in Judea as the final end-time battle which would bring about the arrival of the Messiah. By the authority of Simon, coins were minted declaring the redemption of Israel. 365 Hilary of Poitiers This early French bishop announced the end of the world would happen during this year.  375–400 Martin of Tours This French bishop stated that the world would end before 400 AD, writing, "There is no doubt that the Antichrist has already been born. Firmly established already in his early years, he will, after reaching maturity, achieve supreme power."
1936 Herbert W. Armstrong The founder of the Worldwide Church of God told members of his church that the Rapture was to take place in 1936, and that only they would be saved. After the prophecy failed, he changed the date three more times.
1941 Jehovah's Witnesses A prediction of the end from the Jehovah's Witnesses, a group which branched from the Bible Student movement.
1975 Herbert W. Armstrong Armstrong's fourth and final prediction. Jehovah's Witnesses From 1966 on, Jehovah's Witnesses published articles which stated that the fall of 1975 would be 6000 years since man's creation, and suggested that Armageddon could be finished by then.
Apr 2014–Sep 2015 John Hagee, Mark Biltz The so-called blood moon prophecy, first predicted by Mark Biltz in 2008 and then by John Hagee in 2014. These Christian ministers claim that the tetrad in 2014 and 2015 may represent the beginning of the Messianic end times. Some Mormons in Utah combined the September 2015 blood moon with other signs, causing a large increase in sales of prepperssurvival supplies. 23 Sep–15 Oct 2017 David Meade Conspiracy theorist David Meade predicted that Nibiru would become visible in the sky and would "soon" destroy the Earth. 23 Apr 2018 David Meade After his 2017 prediction failed, Meade predicted the rapture would take place and that the world would end on this date.
Crazy people - all of them.
The book of Gawd, which I am in the process of writing, will also make a prediction, you will have to buy the book though and then decipher the chapters and verses using a rebuilt enigma which will unlock the code to use against the second book chapters and verses which will lead you onto the all seeing japs eye of predictions until finally, after many months of research and understanding the gates of Hades will open and standing there before you will be Aphrodite with a chalice of many riches and the real, truthful, support level of the Dow (following its crash) from which you will be able to go long.
Buy the book and I guarantee you will be rich.