Size of market: Its difficult to measure the number of individuals involved in cryptocurrency mining. Its not difficult to measure the rewards theyre pursuing. Leading cryptocurrencies increased in value in the first half of 2021 from 113% for Bitcoin to over 7500% for Dogecoin. Much of the mining activity shifted from China to elsewhere in the world following Chinas crackdown on cryptocurrency activity in late 2021.Who are we targeting: This book primarily targets would-be investors interested in profiting from all things cryptocurrency. We anticipste the likely reader will have general understanding of the cryptocurrency market and is looking to find value through mining rather than the market. The secondary market includes technology hobbyists looking to build mining rigs for sale or their own use.