Bitcoin [BTC] and ether [ETH] both had a sudden sell-off when December started. Bitcoin fell from over $89,000 to almost $86,000 in one hour, while Ethereum also fell, down more than 5%.

Source: TradingView
The impact was immediate on the broader market. The total cryptocurrency market cap fell from about $1.82 trillion to less than $1.72 trillion, the lowest level in weeks.

Source: CoinGecko
The charts all show a quick, heavy dump followed by a small, uncertain recovery.
Liquidations are increasing as BTC leads the sell-off
The pressure hit derivatives traders hard.

Source: Coinglass
In the last hour alone, up to the time of writing, Bitcoin was responsible for over $1.6 million in liquidations, followed by Ethereum with $847,000.
Most of the heatmap was red, wiping out long positions in big caps like Solana [SOL] and ZCash [ZEC].
The only green spaces were in smaller tokens like Pepijn [PIPPIN]which posted modest gains as volatility spilled over.
Liquidity is scarce, volatility is high
Weak liquidity was the cause of the latest decline. The Kobeissi letter noted those weekend sessions have repeatedly produced oversized moves this year, and this selloff fit the pattern.
With order books thinning and leverage near record highs, even a small sell-off quickly snowballed.
BTC’s rapid decline from $4,000 caused many forced liquidations, accelerating the decline in both majors and midcaps. Despite the maturity of the market, structural vulnerability remains.
Until liquidity improves, sudden moves will continue to dictate price action.
Final thoughts
- The low liquidity and high debt burden made the market extremely vulnerable to sudden selling pressure.
- Until liquidity increases, crypto will remain susceptible to downside shocks.
