India, with a population of 1.43 billion, has surpassed China as the world's most populous country, which could lead to a decades-long investment boom. Goldman Sachs expects India's share of global equity market capitalisation to quadruple by 2075, and its economy to grow 6%-7% annually, surpassing China's. However, Indian stocks are expensive, and experts recommend banks and private financial services as safe bets, along with real estate, IT firms and consumer products.