Crypto Market Cools as Bitcoin Slumps, ETF Outflows Rise, and Regulations Tighten

Bitcoin entered December on a cautious note after a volatile end to November marked by sharp sell-offs, ETF outflows, and new regulatory moves. The cryptocurrency logged its worst monthly performance since 2018, with renewed liquidations and bearish technical signals weighing on sentiment.

Meanwhile, spot Bitcoin ETFs faced multi-billion-dollar withdrawals, the UK confirmed stricter crypto reporting rules starting in 2026, and Tether shut down its Uruguay mining operations amid rising energy costs. Overall, the market is cooling as traders adjust to tightening conditions and shifting global dynamics.

Bitcoin Tumbles 5% in Sudden’ Sunday Slam’ Sell-Off

Bitcoin dropped nearly 5% to around $86,950 on Sunday in a sharp sell-off dubbed the “Sunday slam,” wiping out about $539 million in leveraged positions. The sudden move came after a quiet weekend near $91,500 and marked the asset’s worst November since 2018, ending the month down 17.5%.

Analysts attributed the plunge to a wave of liquidations as selling pressure triggered a domino effect among over-leveraged traders, with nearly 90% of losses coming from long positions in Bitcoin and Ether. Despite the volatility, some market watchers described the correction as a healthy reset rather than a sign of fundamental weakness.

Bitcoin ETF Outflows Spike

BlackRock downplayed concerns over the $2.34 billion in November outflows from its U.S.-listed spot Bitcoin ETF, IBIT, describing the withdrawals as “perfectly normal.” Speaking at the Blockchain Conference 2025 in São Paulo, the firm said the fund’s performance should be viewed in context — earlier demand had pushed its combined U.S. and Brazil listings close to $100 billion in assets at their peak.

The company explained that ETFs are built for liquidity and cash-flow management, making such outflows typical, especially in products heavily influenced by retail investors. Despite recent pressure, IBIT remains a key revenue driver, with investors sitting on about $3.2 billion in cumulative gains after Bitcoin’s rebound above $90,000. At its peak in early October, the firm’s Bitcoin and Ether ETFs together had nearly $40 billion in unrealized profits before a sharp pullback in the broader crypto market.

UK Tightens Crypto Rules: Exchanges to Report User Data from 2026

The UK government’s 2025 Budget has confirmed that from January 1, 2026, crypto trading platforms registered in the country will be required to collect and report customer details, including tax reference numbers and transaction data, under the Cryptoasset Reporting Framework (CAFR). The move is expected to raise about $417 million in additional tax revenue by 2030.

Failure to comply could lead to fines of up to £300 per unreported customer for exchanges and similar penalties for users who fail to provide information. Tax experts warn that the new reporting duties will increase compliance costs for platforms, which are likely to be passed on to traders, and may drive some investors toward noncompliant offshore exchanges.

Technical Analysis

Since peaking at $126,134.65 on October 6, BTCUSD has entered a notable correction, sliding roughly 32% from its recent high. The first signs of weakness appeared with a Shooting Star reversal, followed by a Bearish Engulfing pattern and later confirmed by a Death Cross, as the 20-period EMA crossed below the 50-period EMA—an often bearish signal that can precede extended declines.

The pair remains under both moving averages, sustaining a short- to medium-term bearish structure. Momentum indicators continue to reinforce this view, with the momentum oscillator holding below its 100 baseline and the RSI capped under 50, pointing to ongoing selling pressure.

Currently, BTCUSD trades near $85,607, down about 5% on the day. If the decline persists, immediate support is seen around $80,503, followed by $74,378 and $71,163. On the upside, any rebound is likely to face resistance near $92,993, $98,853, and the previous high at $116,321.

Tether Shuts Down Uruguay Bitcoin Mining Over Rising Energy Costs

Stablecoin issuer Tether is shutting down its Bitcoin mining operations in Uruguay, citing rising energy costs. Local reports indicate that the company is laying off most of its local staff after confirming the decision to the country’s Ministry of Labor.

The move follows reports of a $5 million dispute with Uruguay’s state power company earlier this year. Despite earning $10 billion in profit in the first three quarters of 2025, Tether’s plans to become the world’s largest Bitcoin miner appear to be slowing.

The USDT issuer, now based in El Salvador, continues to expand in Latin America.

Conclusion

In summary, the crypto market heads into December under pressure, with Bitcoin extending its correction amid renewed volatility and shifting institutional dynamics. ETF outflows, stricter regulatory measures, and operational challenges across the sector have added to short-term uncertainty. However, despite the turbulence, long-term participants view the current phase as a healthy reset—potentially laying the groundwork for renewed momentum once market conditions stabilize.