The office of Blockchains LLC, in an industrial park east of Reno, Nev., where Apple, Google and Tesla all have facilities, Oct. 23, 2018. Blockchains is the vessel through which the cryptocurrency investor Jeffrey Berns has spent some $300 million to buy up 67,000 acres of the surrounding desert, envisioning it as a community based on blockchain technology. (Jason Henry/The New York Times)