Earlier this year, Warren Buffett’s Berkshire Hathaway invested $500 million in a Brazilian fintech start-up called Nubank. This development is noteworthy because Warren Buffett seldom invests in start-ups, preferring to stick to his “circle of competence”. Back in 2018, his company had surprised the business community when it had placed a rare bet in start-ups by investing $300 million in India’s Paytm. Paytm was listed last month and Nubank this month. As several other start-ups queue up for IPOs, and record amounts of dollars flow into this alternative investment space, one observes that the start-up activity has truly turned mainstream.