The cryptocurrency market experienced one of its most dramatic single-day sell-offs in months on September 24, 2019, as Bitcoin lost $1,000 in under thirty minutes, triggering a cascade of liquidations across major derivatives exchanges and wiping $35 billion from the total crypto market capitalization.
TL;DR
- Bitcoin crashed from roughly $9,500 to below $8,000 in a matter of minutes on September 24
- Total crypto market cap plummeted from $257 billion to approximately $222 billion
- BitMEX saw $710 million in forced liquidations — $643 million in BTC alone
- Ethereum dropped 12.9% to $170, while XRP fell 7% to $0.24
- Tether (USDT) surpassed Bitcoin Cash to become the fourth-largest cryptocurrency by market cap
The Flash Crash That Stunned Traders
Wednesday afternoon\’s trading session delivered a brutal shock to crypto markets. Bitcoin core (BTC), which had been hovering near $10,000 for several weeks, suddenly plunged below $8,000 in a rapid sell-off that caught most traders off guard. The price has since recovered to the $8,300–$8,500 range, but the damage to leveraged positions was already done.
According to data from the time, BTC was showing 12% losses over 24 hours and a staggering 17.2% decline over the preceding seven-day period. At press time on September 25, the cryptocurrency was trading at approximately $8,487.
BitMEX Liquidations Reach $710 Million
The leveraged trading platform BitMEX was hit particularly hard by the sudden downturn. Positions worth a combined $710 million were forcefully liquidated during the crash. The vast majority — approximately $643 million — came from BTC positions, with another $53 million from Ethereum trades and roughly $14 million from various altcoin contracts.
This level of forced liquidation underscores the high leverage many traders were employing, and highlights the inherent risk of trading cryptocurrency derivatives during periods of extreme volatility.
Ethereum and Altcoins Take a Beating
Ethereum (ETH) was not spared from the carnage. The second-largest cryptocurrency dropped 12.9% in 24 hours and a full 20% over the week, trading hands at roughly $170 per coin. Global ETH trade volume surged to $13.5 billion as traders scrambled to reposition.
Among the top ten digital assets, losses ranged from 10% to 25% over 24 hours and 15% to 35% over the seven-day period. Bitcoin Cash (BCH) was among the hardest hit in the top tier, declining 21% in a single day and 31% over the week to trade at $219 — raising concerns it could dip below the psychologically important $200 level.
Tether Overtakes Bitcoin Cash for Fourth Spot
In an ironic twist, the market crash propelled Tether (USDT) into the position of fourth-largest cryptocurrency by market capitalization, surpassing Bitcoin Cash. The dollar-pegged stablecoin\’s market cap stood at $4.13 billion, and its 24-hour trading volume reached an eye-popping $36.9 billion — making it the single most traded cryptocurrency on the planet at that moment.
USDT accounted for 57% of all Bitcoin trades, reflecting a massive flight to stability as traders sought refuge from the volatility. Despite ongoing controversy about its reserves — which were reported to be only 74% backed by cash and cash equivalents — Tether\’s utility as a safe haven during market turbulence was undeniable.
Bakkt\’s Underwhelming Debut Adds to Bearish Sentiment
The crash coincided with growing disappointment over Bakkt\’s physically delivered Bitcoin futures launch earlier in the week. The Intercontinental Exchange-backed platform saw only 72 BTC traded on its opening day, a fraction of the 5,000 BTC that changed hands on CME Group\’s cash-settled futures market.
On Tuesday, as spot markets were tumbling, Bakkt did see a modest increase to 113 one-day contracts. Travis Kling, founder of the Ikigai digital currency hedge fund, noted that while the volumes were disappointing, the launch represented an important milestone for institutional Bitcoin infrastructure.
Why This Matters
The September 24–25 crash served as a stark reminder of the cryptocurrency market\’s inherent fragility and the outsized role that leveraged trading plays in amplifying price movements. A single rapid sell-off cascaded into nearly three-quarters of a billion dollars in liquidations, demonstrating how derivatives markets can turn a moderate correction into a full-blown crash. The event also highlighted the growing importance of stablecoins like Tether as critical infrastructure during periods of market stress, even as questions about their reserve backing continued to linger. For investors and traders, the episode reinforced the importance of risk management in a market that can move $1,000 in thirty minutes.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Past performance is not indicative of future results. Always conduct your own research before making investment decisions.