Bitcoin (BTC) Tumbles to $77K as Iran-US Tensions Escalate and Oil Spikes Above $90

Key Highlights

Table of Contents

BTC declined more than 2% to $77,161 following Iran’s ballistic missile launches targeting US military installations in response to American strikes on Larak Island
Crude oil markets rallied over 2%, pushing Brent crude beyond the $90 threshold
US 10-year Treasury yields climbed to 4.76%, marking the peak level since January 2025
Futures open interest for Bitcoin increased across CME, Binance, and Hyperliquid platforms despite downward price movement
Prediction market Polymarket shows 68% odds that Bitcoin will reach $85,000 before the end of December 2026

The leading cryptocurrency experienced a significant downturn on Monday as escalating tensions between Washington and Tehran sent shockwaves through global financial markets. Bitcoin’s value plummeted over 2% to touch $77,161 before staging a modest rebound to approximately $77,813.

The downturn followed American military operations that targeted IRGC missile launcher installations on Larak Island, situated in the strategic Strait of Hormuz. Tehran’s response included launching ballistic missiles directed at several American military facilities throughout the Middle East region. According to Fox News sources, defensive systems successfully intercepted nearly all incoming projectiles, with minimal infrastructure damage reported.

The US Central Command (CENTCOM) rejected Iran’s characterization of the American operation as unprovoked aggression, stating that military personnel executed “limited, precise action” to neutralize minelaying activities that represented an “imminent threat.”

BREAKING: Iran has just struck an oil tanker with 3 anti-ship cruise missiles in the US-backed southern Omani corridor while completing an outbound transit in the Strait of Hormuz under US escort, per UKMTO.
The vessel is the Saudi VLCC oil tanker "SIDR."
— The Hormuz Letter (@HormuzLetter) August 31, 2026

Energy markets responded swiftly to the escalation. Brent crude futures advanced more than 2% to surpass $90 per barrel, while WTI crude jumped above $85.50. Goldman Sachs analysts had earlier observed that petroleum shipments through the Strait of Hormuz had rebounded to approximately two-thirds of typical capacity.

The cryptocurrency had momentarily climbed above $79K earlier in the session on positive news flow, but Iran’s military response reversed those gains. Market participation surged 50% across the 24-hour period, indicating heightened trader engagement.

Treasury Market Weakness Compounds Selling

Beyond Middle Eastern geopolitical developments, additional selling pressure emerged from US fixed income markets. The benchmark 10-year Treasury yield advanced to 4.76%, representing its highest level since January 2025. The 30-year yield touched 5.269%, positioning just six basis points beneath its peak since January 2007.

There it is.
12 days since US Treasury intervention in the bond market was announced and yields are up to a new 19-month high.
The 10Y Note Yield is now just 2 basis points away from its highest level since 2007.
The bond market appears to be completely ignoring the US… pic.twitter.com/PS2XG655Rr
— The Kobeissi Letter (@KobeissiLetter) August 31, 2026

Treasury Secretary Scott Bessent informed CNBC that his department had not yet implemented measures to support long-duration bond prices. Despite announcing plans to expand debt buyback operations to $4 billion starting in September—double the previous amount—yields continued their ascent.

Legendary investor Ray Dalio publicly advocated for reducing bond exposure while increasing gold holdings, suggesting “a bit of Bitcoin” as protection against a potential American debt crisis.

The US dollar index strengthened to approximately 99.6, creating additional resistance for cryptocurrency valuations. American equity markets also declined, with both the S&P 500 and Nasdaq shedding roughly 0.4%.

Technical Indicators Flash Warning Signs

Technical analyst Rekt Capital identified a hidden bearish divergence pattern in Bitcoin’s daily Relative Strength Index, cautioning that continued lower highs in the daily RSI could indicate “mounting weakness.” The daily RSI registered 70.7 on Monday, maintaining position within overbought territory.

Market observer CryptoXLarge highlighted on X that Bitcoin has historically never finished September with gains immediately following a positive August, describing this pattern as a “historical extreme” worthy of attention as the month commences.

$BTC IS ABOUT TO TEST A VERY WEIRD SEPTEMBER PATTERN
August is closing green but the problem i am watching rn is
Bitcoin has never managed to post a green September immediately after a green August
That doesn’t mean September HAS to dump
But when a market is sitting at a… pic.twitter.com/XxH9WFiOrN
— ᴄʀʏᴘᴛᴏ xʟᴀʀɢᴇ (@cryptoxlarg) August 30, 2026

Bitcoin’s 50-week exponential moving average rested at $77,269, a threshold market analysts have identified as critical support. BTC futures open interest expanded 0.65% to $53.88 billion during the final trading hour, with derivatives markets showing accumulation activity.

U.S. spot Bitcoin ETFs recorded $217 million in net inflows on Aug. 31, led by BlackRock’s IBIT with about $206 million, while spot Ether ETFs drew $87.68 million, with BlackRock’s ETHA accounting for roughly $59.94 million. BlackRock is the world’s largest asset manager,… pic.twitter.com/O4R0RVVZWn
— Wu Blockchain (@WuBlockchain) September 1, 2026

American spot Bitcoin exchange-traded funds captured $217 million in net inflows on August 31, with BlackRock’s IBIT product leading the charge at approximately $206 million.