The document discusses the rise of cryptocurrency mining and its parallels to historical gold rushes. It notes that over just a few months in 2017, hundreds of thousands of people became involved in mining cryptocurrencies using computer hardware. These miners have quickly become multimillionaires. The document argues that cryptocurrency mining now provides a more effective "rush" than the gold rushes of the past. It suggests that data mining will be an even larger "rush" or opportunity for wealth in the future as the amount of digital data and content grows exponentially. Mining and analyzing this digital data and content will be crucial for powering technologies like artificial intelligence and the knowledge economy.