Bitcoin traded around $77,150 early Monday after rising more than 20% last week, holding above $77,000 as U.S. Treasury Secretary Scott Bessent announced an “economic D-Day” against Iran. Bessent said the “single greatest financial offensive ever marshaled against an adversary” would begin at dawn and aim to sever the economic lifelines supporting Tehran’s regime. He is scheduled to formally declare the sanctions at a press conference on August 24, 2026. The measures could include secondary sanctions against foreign banks, firms and countries that continue doing business with Iran. Iran warned that countries supporting the sanctions would be treated as committing an “act of war” and said no oil would leave the Strait of Hormuz or Persian Gulf if U.S. pressure continued. Market data showed 68% odds of Bitcoin reaching $85,000 by December 31, 2026. Gold rose above $4,645 as the dollar weakened, while 10-year Treasury yields fell to about 4.71%. Bitcoin futures open interest increased 0.70% to $55.37 billion over 24 hours, although four-hour open interest declined 0.50%, including drops on CME and Binance.