Exuberant Tribute to Alan Greenspan. This combination of events caused the phrase at present to be most often associated with the 1990s dot-com bubble and the 2000s US housing bubble although it can be linked to any financial asset bubble or social frenzy phenomena, such as the tulip mania of 17th century Holland. The phrase is often cited in conjunction with criticism of Greenspan's policies and debate whether he did enough to contain the two major bubbles of those two decades. It is also used in arguments about whether capitalist free markets are rational. Robert J. Shiller, Nobel Prize Laureate and author of the seminal book Irrational Exuberance, called Bitcoin the best current example of a speculative bubble. See also Dot-com bubble Extraordinary Popular Delusions and the Madness of Crowds Fedspeak Fear of missing out Stock market bubble United States housing bubble References English phrases Inflation Investment Dot-com bubble