U.S. authorities have launched a multi-agency national security investigation into Bitmain, focusing on whether its Bitcoin mining machines could be remotely controlled by China for intelligence gathering or to disrupt critical infrastructure. This investigation follows a federal security review last year, which identified Bitmain's equipment near U.S. military bases as a significant national security risk. In July, the Senate Intelligence Committee also highlighted potential vulnerabilities in Bitmain's machines that could be exploited. Bitmain has denied all allegations, asserting that its devices lack remote control capabilities and that it complies with U.S. laws.