Risk-off mood pulls bitcoin and ethereum lower amid US-Iran strikes and rate hike bets

The decline in BTC and ETH appears to be a general risk-off shift rather than a crypto-specific issue, moving in line with equity weakness and the rise in Treasury yields this week. Despite the drop, both assets are still up significantly for the quarter, so the move looks like a retreat within an uptrend rather than a change in direction for now, though the decline in Bitcoin's spot volume reported by K33 is noteworthy as a potential sign of weakening confidence. The most practical factor for traders is the change in Federal Reserve rate expectations, because crypto's lack of yield makes it especially reactive to repricing around the September 15-16 meeting. Separately, and this is earlier-week context rather than the latest 24 hours, large exchange deposits from market maker Wintermute and an unidentified ETH whale added on-chain selling pressure that probably worsened the initial drop, even though deposits alone do not confirm actual sales. Overall, the situation suggests further declines are likely to stem from geopolitics and rates rather than fundamental issues, with the conflict's direction being the most critical factor for both assets in the near term.

The hot August rally in crypto is cooling rapidly as war escalation and increasing rate hike expectations combine with thinning trading volume and reports of large holders sending coins to exchanges.

Bitcoin and Ethereum extended their pullback from a strong August run this week, as fresh military escalation between the US and Iran drove a broad risk-off reaction across global markets and pushed expectations for a Federal Reserve rate hike higher.

Bitcoin traded in a range of roughly $76,600 to $78,000 through Tuesday and Wednesday, down about 1.5 to 2% as new US strikes on Iranian targets triggered renewed selling. Ethereum followed suit, falling to around $2,373 to $2,400, a decline of roughly 2 to 2.5%, with the sharpest part of the move accompanied by about $115 million in leveraged long positions liquidated within a single hour, according to data from Coinglass.

The magnitude of the retreat should be viewed against the context of a very strong prior month. Ether rose 33% in August and was up 56% for the quarter as of recent reporting, meaning the current move looks more like a pause or partial retracement within an established uptrend than a reversal, at least based on price action so far. That said, K33 noted a notable change in underlying market conditions, reporting that Bitcoin's average daily spot volume fell 35% over the past week to $3.1 billion, a sign that trading conviction may be weakening even where price has held up relatively well.

The immediate catalyst for this week's weakness has been the renewed conflict between the US and Iran. US Central Command confirmed strikes against Islamic Revolutionary Guard Corps targets, including air defense positions, radar systems, mine laying capability and communication sites, prompting Iranian retaliation against US military installations in the region. The pattern has closely mirrored moves across other risk assets, with the S&P 500 falling to its lowest level since August 4 during the worst of Tuesday's selloff and Treasury yields climbing as investors priced in both geopolitical risk and shifting rate expectations.

On the policy side, CME Group's FedWatch tool showed market implied odds of a Fed rate hike at the September 15-16 meeting rising to around 66%, a sharp shift from a week earlier when a hold was seen as the more likely outcome. Because Bitcoin and Ethereum do not pay yield, they are particularly sensitive to this kind of repricing, and the jump in hike odds has added a second, more structural headwind alongside the geopolitical shock.

Adding further context, though this relates to earlier in the week's initial escalation rather than the most recent 24 hours, reports highlighted large on-chain transfers that may have amplified selling pressure. Market maker Wintermute reportedly deposited around 5,100 BTC, worth close to $400 million, to the Binance exchange over a two-day period, while a separate whale or institutional wallet moved nearly 41,000 ETH, worth more than $100 million, to exchanges according to on-chain tracker Lookonchain. Exchange deposits of this kind do not confirm that coins were actually sold, but they are widely monitored by traders as a leading indicator of potential sell-side flow, and their timing alongside the initial leg of this week's selloff suggests they may have contributed to the depth of the move.

Taken together, the current setup points to a market being driven primarily by external macro and geopolitical forces rather than crypto-specific developments. With both the trajectory of the US-Iran conflict and the outcome of this month's Fed meeting still unresolved, further volatility in Bitcoin and Ethereum in the days ahead looks likely to track those two variables closely.