Memories fade and history repeats itself
I am reading The Great Crash 1929 by John Kenneth Galbraith and in the first paragraph of his foreword to the 1975 edition he writes the following:
“There is merit in keeping alive the memory of those days (1929). For it is neither public regulation nor the improving moral tone of corporate promoters, brokers, customer’s men, market operations, bankers, and mutual fund managers which prevents these recurrent outbreaks and their aftermath. It is the recollection of how, on some past occasion, illusion replaces reality and people got rimmed.”