MANY INVESTORS would rather buy Puerto Rican bonds than try to take on a tech titan in its prime. Amazon owns e-commerce. Google is synonymous with search. Facebook dominates social media. Tech is a winner-take-all game, and as the Internet economy matures, building a winner from scratch looks less promising by the day. Even new categories like on-demand transportation and lodging quickly declare victors. Uber, founded in 2009, is worth $62.5 billion (Rs 3.95 lakh crore). Airbnb, just a year older, is valued at $22.5 billion.