This podcast the cycle a stock goes through when the price of its shares becomes a large multiple of its capacity to generate income.  The current market is at the same insane levels that we have seen in the last two decades.  The subsequent fallout seeks to push the stock back down to a level that attracts new value-based investors.  In the case of many dot.com companies, the value was zero.  Wonder how this reflects on cryptocurrencies?

(the title is lifted from the 1841 book, Extraordinary Popular Delusions and the Madness of Crowds)