This examines the phenomenon of asset price bubbles, illustrating how periods of economic euphoria often lead to speculative investment and the construction of massive, often economically questionable, projects like skyscrapers. It highlights the historical connection between booming asset markets (stocks and real estate) and increased economic activity, driven by rising household wealth and lower costs of capital for firms. The text uses examples such as the Dutch Tulipmania and the Japanese asset bubble of the 1980s to demonstrate how these bubbles form and the severe economic downturns, including bank failures and credit disruptions, that follow their inevitable bursting. Ultimately, the source discusses the challenges faced by central banks in addressing asset price inflation, contrasting their traditional focus on goods price stability with the significant economic consequences of collapsing asset bubbles.