Bitcoin returned to $84,000 on Friday, October 1, after disappointing US jobs data and falling Federal Reserve rate-hike odds drove a rally near $87,000. Bitcoin added and lost $50 billion in a single day. Crypto markets reacted heavily to a tanker strike in Hormuz, while oil prices barely moved. Viral posts blamed Iran, but United Kingdom Maritime Trade Operations did not identify the attacker and said authorities were investigating. The agency reported no casualties or pollution.