Weekly Crypto Brief — September 25, 2026
Executive Summary
From September 18 to 25, Bitcoin and Ether gained roughly 4% and 3%, respectively, while giving back part of the rally after BTC briefly reached the $87,000 area. Strong spot ETF inflows into BTC and ETH contrasted with a more restrictive rate backdrop and rising Treasury volatility. The week also brought fresh U.S. regulatory guidance and a major security incident at Bitget, with stablecoin issuers freezing some identified assets. Price action and sentiment were positive, but monetary policy, security, and regulatory execution remain material risks.
Market Overview
| Indicator | Sep 18 close | Sep 25 close | Change |
|---|---|---|---|
| Bitcoin (BTC) | $80,874 | $84,076 | +3.96% |
| Ethereum (ETH) | $2,611.35 | $2,693.89 | +3.16% |
| Fear & Greed Index | 56 — Greed | 71 — Greed | +15 points |
Daily UTC closes; BTC from CoinGecko and ETH from Yahoo Finance, with each return calculated from September 18 and 25 closes from the same provider. BTC reached about $87.4K on September 21 (daily history) before pulling back. We could not retrieve a comparable historical series for total crypto market capitalization at the September 25 close, so Sunday’s global snapshot is not presented as Friday data.
Ver dados em tabela
| date | value |
|---|---|
| Sep 18 | 56 |
| Sep 19 | 71 |
| Sep 20 | 71 |
| Sep 21 | 70 |
| Sep 22 | 78 |
| Sep 23 | 71 |
| Sep 24 | 71 |
| Sep 25 | 71 |
Key Events This Week
- Large ETF inflows. U.S. spot ETFs attracted $2.39 billion in BTC, $689.8 million in ETH, and $188.1 million in SOL products from September 21–25 (Farside BTC, ETH, and SOL flow tables). BTC funds recorded net inflows on all five trading days. That supports the institutional-demand case, but it does not insulate prices from rates.
- Bitget disclosed a major security breach. The exchange revised its initial $351.6 million estimate to about $387.5 million transferred to attacker-controlled addresses after adding Zcash and TRON assets (Bitget update). That figure describes identified transfers, not final net losses; the investigation and recovery effort were ongoing. Circle and Tether froze some identified assets.
- The CFTC updated crypto and blockchain FAQs. Its September 24 update clarified activities by registrants and registered entities, advancing administrative interpretation while broad legislation remains unresolved.
- The CFTC issued guidance on “mention market” contracts. Its September 22 advisory covers event contracts tied to a person saying certain words, appearing at an event, or interacting with someone; it flags manipulation risks and gives exchanges factors to consider when listing such contracts.
- Hester Peirce announced she will leave the SEC on October 2. The expected commission change could alter the tone of crypto policy discussions, though it does not determine the outcome of a rule or case by itself.
- Options expiry added short-term context. The $15.6 billion BTC options expiry on September 25 was reported alongside the price losing momentum (Decrypt); the timing does not establish causation.
News Highlights by Theme
Regulation
- CFTC updates FAQs on registrants and registered-entity activities involving crypto and blockchain — CFTC, Sep 24.
- CFTC releases staff advisory on “mention market” contracts — CFTC, Sep 22.
- SEC crypto FAQ addresses token buybacks, network upgrades, and promises of profit — The Block, Sep 25.
- Hester Peirce is set to leave the SEC next week — CoinDesk, Sep 25.
Institutional activity and ETFs
- Bitcoin ETFs draw $2.39 billion in a week of inflows — crypto.news, Sep 26; figures attributed to Farside Investors and covering Sep 21–25.
- ARK brings a $1.3 billion venture fund onchain through Securitize — The Block, Sep 24.
Security
- Bitget updates the amount transferred to about $387.5 million — Bitget, Sep 25; revised from the initial $351.6 million estimate.
- Bitget says $352 million in assets were affected by a breach — CoinDesk, Sep 24; initial estimate.
- Circle and Tether freeze assets linked to the Bitget hack — CoinDesk, Sep 25.
Macro Backdrop
The Fed raised the federal funds target range to 3.75%–4.00% on September 16 (FOMC statement) and kept inflation in focus. During the reporting week, Boston Fed President Susan Collins defended the decision on the grounds that inflation remained persistent (AP, Sep 21); this was not official guidance that further hikes were certain. Treasury yields rose late in the week as BTC retreated from Monday’s high. That is the observed backdrop, not proof of a single cause: ETF flows and crypto-specific developments also supported demand. The CFTC updated FAQs on customer investments in tokenized forms of permitted assets and blockchain recordkeeping.
The Fear & Greed Index stayed in “Greed,” rising from 56 to 71 between the two Fridays and reaching 78 on September 22. The index aggregates market conditions; it is not a directional forecast. Bond markets were volatile, creating a source of risk for long-duration assets and leveraged crypto positions.
On-chain and Derivatives
Weekly spot ETF flows are available above. We did not obtain an auditable, consistent series for funding, open interest, liquidations, or on-chain flows across the full seven-day window, so this edition draws no conclusion from those measures. The September 25 options expiry is included as market context, not as a standalone explanation for price action.
What to Watch Next Week
- Sep 29: JOLTS report for August, according to the BLS schedule; a stronger or weaker openings figure could shift rate expectations.
- Oct 1: U.S. ISM Manufacturing, listed on the week-ahead economic calendar.
- Oct 2: U.S. Employment Situation report for September at 8:30 a.m. ET, according to the BLS schedule.
- Watch for new SEC and CFTC releases, litigation related to prediction markets, and technical updates on the Bitget incident. We found no confirmed major protocol upgrade or token unlock for the coming week.
Methodology and Disclaimer
Editorial window: Sep 18–25, 2026. Crypto returns compare daily UTC closes on Sep 18 and Sep 25; news is limited to items published by Sep 25, except the ETF-flow article published Sep 26, which explicitly reports the five sessions through Sep 25. Historical Fear & Greed readings came from Alternative.me’s API. Internal fetchers ran on Sep 27 and returned Saturday articles, which were excluded. Metrics without a comparable historical series were omitted. This publication is for informational purposes and is not investment advice or a recommendation to buy or sell.