There is an interesting book on the subject titled: “Extraordinary Popular Delusions and the Madness of Crowds” by Charles Mackay, LL. D.
It was written in 1841 but it is as pertinent today as it was then. The book discusses such delusions as the Tulip Bulb Crisis and the introduction of stock bubbles and paper currency. (I think we are in a currency bubble that is just expanding more slowly than the one described in pre-revolutionary France.)
Just goes to show that this was a thing long before Ghostbusters.