Total crypto market cap has decreased 4.08% in value. 

• Bitcoin slipped a little in December. It started the month around $90,374 and finished around $87,502, down about 3% overall. What mattered most was how it moved early on. Prices swung hard in the first few days, jumping to nearly $98,909 and then dipping as low as about $83,800. After that early burst of volatility, the rest of the month was quieter and drifted lower into year end. That often happens in late December because fewer people are trading, and more activity is driven by risk management, end of month rebalancing, and hedging rather than strong new buying.

• BTC Spot ETF. Money flows were mixed but turned more negative into the final days. There were still big up days, such as about +$457 million of inflows on 17 December, but there were also large outflow days, including around -$358 million on 15 December. The month finished with another large outflow of about -$348 million on 31 December, after a big inflow the day before (+$355 million on 30 December). In plain terms, investors were moving money in and out quickly right into year end. Even though those daily flows can be noisy, the total ETF market is now very large, with roughly $113 billion of assets at month end, so big inflow or outflow days can still influence short term price moves and trading activity.   

• Ethereum. Ethereum was broadly flat in December, but it still had plenty of movement along the way. It started the month around $2,992 and finished around $2,967, down less than 1% overall. The important point is that it did not move in a straight line. It dipped early to about $2,716, then rallied to around $3,477 mid month, and then gave back much of that gain into year end. So while the final result looks quiet, the month itself was quite volatile.

• US spot Ethereum ETF. The month showed more money going out than coming in. Adding up the daily totals, December net flows were around -$616 million, with most of that pressure concentrated in the middle of the month. The two biggest outflow days were 15 December (-$224.78 million) and 16 December (-$224.26 million). Flows improved later on, including a positive day on 30 December (+$67.84 million), but the month still finished with an outflow on 31 December (-$72.06 million). Even with those outflows, the market remains meaningful in size, with around $17.95 billion of total net assets at month end, and about $808 million traded on the final day of the month, showing that activity and liquidity in the ETF market stayed healthy despite the net withdrawals. 

• Price Movements. Most crypto sectors were down over the month, and the biggest falls were in areas that tend to move more sharply when investors pull back. The weakest groups were DePIN (-18.3%), staking services (-17.9%), data availability (-16.8%), gaming (-16.3%), real world assets or RWA (-16.2%), AI (-15.9%), perpetual DEX trading (-15.5%), and data services (-15.0%). These categories are often linked to growth expectations and new investment themes, so they can drop harder when the market turns cautious. By comparison, the more headline driven areas like memecoins (-11.2%) and NFT applications (-9.5%) were still down, but they were not the worst performers this time.
  

  A smaller set of sectors held up better or even rose. Privacy coins (+24.2%) and social tokens (+15.5%) were the standout gainers, while the large, widely traded parts of the market were also positive, including Ethereum (+6.5%), store of value (+5.7%), exchange tokens (+2.6%), Bitcoin (+2.0%), and oracle tokens (+1.3%). At the same time, some large “core” areas still finished lower, such as bridges (-6.6%), smart contract platforms (-4.9%), and the Bitcoin ecosystem (-3.1%).

• Regulatory. US market access signals shifted toward clearer operating rails for intermediaries, especially around derivatives collateral and stablecoin issuance. On Dec 8, 2025, the CFTC’s Market Participants Division issued Letter No. 25-40, a staff no-action position that, subject to conditions, addresses when an FCM may accept certain non-securities digital assets, including payment stablecoins, as customer margin collateral and how those assets are treated for specified regulatory purposes. The same day, the CFTC issued Letter No. 25-41, withdrawing Staff Advisory 20-34 on accepting customer virtual currencies into segregation, and the Commission also withdrew its prior “actual delivery” interpretive guidance for certain retail crypto transactions, with the withdrawal described as effective Dec 10, 2025 and announced via a Dec 11 CFTC press release. 
• Macro. The Federal Reserve cut the target range for the federal funds rate by 25 bps to 3.50% to 3.75% at the December 9 to 10, 2025 FOMC meeting, and framed next steps as data dependent while assessing the “evolving outlook” and “balance of risks.” In the same month, inflation data arrived with unusual gaps because the government shutdown disrupted collection and publication: the BLS CPI release for November 2025 reported headline CPI +2.7% y/y and core CPI +2.6% y/y, and explicitly noted that month to month CPI changes were not published because October data could not be collected retroactively. Labor market data also reflected the disruption but still provided a clear directional read: the BLS reported nonfarm payrolls +64,000 in November, with unemployment at 4.6% (and October household survey data not collected).  For rates and USD liquidity expectations into year end, the key macro takeaway in December was a combined signal of a lower policy ceiling after the Dec 10 cut, disinflation continuing on a y/y basis in the CPI release, and softer, noisier labour indicators due to data interruptions, which tends to widen the range of plausible outcomes markets must hedge.