Demonetization is like changing engine oil in an economy. - It provides short-term hardship but long-term benefits like faster economic growth, expanding the tax base, reducing black money and inflation. - Most currency in circulation is in 500 and 1000 rupee notes that were demonetized. - Demonetization impacts different sectors depending on their cash usage, from positive impacts on infrastructure to temporary impacts on industries like pharma and banks.