Pada tiap bubble, orang selalu membantah bahwa ini beda dengan yang dulu, ini bukan bubble 'the most commonly repeated and most expensive investment advice ever given in the boom just before a financial crisis stems from the perception that “this time is different.” ... Each time, society convinces itself that the current boom, unlike the many booms that preceded catastrophic collapses in the past, is built on sound fundamentals, structural reforms, technological innovation, and good policy.'