About 97% of the machines used to mine Bitcoin currently come from companies based in China. This heavy reliance on foreign technology has created a bottleneck at American ports and raised alarms about the long-term security of the network. Related Reading: Bitcoin ETFs Pull In $56B As CEO Pitches Crypto Over Gold To fix this, US Senators Bill Cassidy and Cynthia Lummis introduced the Mined in America Act. The bill aims to move the production of specialized computer chips and mining rigs onto American soil