Warren Buffett's Berkshire Hathaway invests almost $600 million into fintech. Berkshire Hathaway has decided to invest in two payment processing companies. Those include India's PayTM and Brazil's StoneCo. Both companies have a significant share in large emerging markets. In fact PayTM boasts that it has more users than PayPal. All this makes investing in tech seem like a safe bet for the normally conservative Buffett.