Nor was it simply the deep pockets. At these prices, even smaller operators have been able to make real money running a few machines in home-based, under-the-radar mines. Take the 20-something Wenatchee man we’ll call “Benny”—he didn’t want to be identified—who last July bought three mining servers, set them up in his house (one in the master bedroom and two in the living room)—and began mining Ethereum, bitcoin’s closest cryptocurrency rival. As Ethereum climbed from $165 in July to nearly $1,200 in January, Benny had not only repaid his $7,000 investment but was making enough to pay his mortgage. As a side benefit, this winter, Benny’s power bill went down: The waste heat from the three churning servers kept the house at a toasty 78 degrees. “We actually have to open the windows,” he told me in January. His servers, meanwhile, pretty much run themselves—although, when he’s at work, clerking at a grocery, he monitors the machines, and the Ethereum price, on his phone. “It’s just basically free money,” Benny says. “All I have to do is wake up in the morning and make sure nothing crashed during the night.”
An additional passphrase can be added to the 24-word seed. This provides extra protection, since anyone who finds someone else’s 24-word seed is free to access the funds. If the optional passphrase is added, an attacker still wouldn’t be able to access funds without both the seed AND the passphrase. If the passphrase is forgotten, it cannot be recovered.
The domain name "bitcoin.org" was registered on 18 August 2008. In November 2008, a link to a paper authored by Satoshi Nakamoto titled Bitcoin: A Peer-to-Peer Electronic Cash System was posted to a cryptography mailing list. Nakamoto implemented the bitcoin software as open source code and released it in January 2009. Nakamoto's identity remains unknown.