https://www.linkedin.com/pulse/steve-jobs-message-unicorns-count-nickels-michael-moritz

The fact that there are more technology behemoths — Amazon, Apple, Google, Facebook, Microsoft — than at any time in history makes life tougher for the start-ups. These companies, together with a raft of smaller, rapidly growing, profitable ones (and, increasingly, several Chinese businesses with Silicon Valley outposts) are run by people eager to conquer new frontiers. That has had a dramatic effect on the cost of start-up labour.