There is a number that has been repeatedly mentioned these past few days: 7.7 billion US dollars. It's not a sovereign fund, nor is it an oil advance payment, but rather the portion of cryptocurrency assets estimated to be controlled by the Iranian regime. The United States continues to tighten financial sanctions against Iran, targeting this "off chain reserve"; On one hand, the House of Representatives is preparing to vote on a war power resolution involving Iran, attempting to put the reins of Congress on Trump's military action against Iran. Industry insiders are already reminding that Washington's real leverage may be the threat to cut off the connection between cryptocurrency exchanges and the US banking system, turning any on chain funds related to Iran into "toxic assets". For exchanges, this is not a matter of regulatory fines, but rather a question of whether they can continue to accept US dollars and live in a compliant world. If this strategy runs smoothly on Iran, the next target may not necessarily be someone else. Whether encrypted assets are a "decentralized neutral network" in geopolitical games or a new battlefield for central banks' sanctions is likely to have a clearer answer soon. BTC regulation in Iran