On Tuesday, in the middle of the European night, bitcoin fell below $81,000, rebounded above $84,000, then settled just above $83,000. Meanwhile, the Seoul stock market plunged 5.5%. For anyone holding a highly leveraged position, the entire episode played out within a few hours—often without them.

In brief

  • Numerous crypto positions were liquidated over 24 hours at the start of the week, including $688.56 million in bullish bets, according to BeInCrypto.
  • Ether was trading at $2,503.64 on October 13 at 7:45 a.m. New York time, down $50.33 from the previous day. U.S. ether ETFs lost $542.2 million between October 5 and 9.
  • Ledger says it found an unauthorized implant in at least one device sold by CryptoBilis: custody risk is back in the spotlight.

One Night, Two Wicks

The trigger came from Asia. According to CoinDesk, South Korea's Kospi index plunged 5.5% on Tuesday, dragged down by Samsung Electronics and SK Hynix. Concerns over artificial-intelligence spending and Chinese competition in chips did the rest. The Korean index is now about 38% below its June record.

Bitcoin initially followed the move. It broke below $81,000, then erased the decline and climbed above $84,000 before returning toward $83,000. This kind of candle leaves two long wicks on the chart—and accounts wiped out on both sides.

The backdrop was already tense the previous day. On Monday, bitcoin touched an intraday low near $82,300 during the U.S. session. Over 24 hours, it was down 1.6% and ether 1.3%. XRP, Solana, and HYPE fell between 3% and 4%. In the background: a firm dollar, rising bond yields, gold around $4,180 an ounce, and WTI above $92 a barrel.

Add the U.S. inflation data released this week. A surprise number moves interest rates, then the dollar, and therefore bitcoin. Keep the economic calendar open and note the exact release time before opening any position.

Leverage Pays the Bill

Liquidation figures show who paid the price. According to BeInCrypto, citing CoinGlass, 172,662 traders were liquidated over 24 hours. Long positions accounted for 88.9% of the total, compared with $85.58 million for shorts.

Ether led the tally with $169.23 million liquidated, 86.3% of it from bullish bets. Bitcoin followed with $160.48 million, and Solana with $60.41 million. Binance accounted for 51.9% of liquidations.

The mechanism does not change. When the price falls, the platform closes positions whose margin is no longer sufficient. These forced closures are market sells. They push the price lower and trigger the next wave of liquidations. The cascade stops when there is nothing left to liquidate. The rebound often comes immediately afterward.

A liquidation is not negotiable: the platform closes your position for you, at the worst moment of the session.

The liquidated trader does not benefit from the return to $83,000. They were right too late—which amounts to being wrong.

A smartphone lit up on a kitchen table at dawn, beside a coffee and a notebook

Ether is taking a bigger hit than bitcoin, and this did not start this week. At $2,503.64 on Tuesday morning, it was about $1,742 below its level a year earlier, Fortune notes. Its record, reached in August 2025, was close to $5,000.

Crypto.news places the low point of the sell-off around $2,410. The rebound took it back toward $2,530, still below its 20- and 50-day moving averages. Analysts cited by the site place resistance between $2,560 and $2,575.

Institutional flows are not helping. U.S. spot ether ETFs recorded $542.2 million in net outflows between October 5 and 9. When fund money is leaving while leverage is entering, the price becomes fragile.

One detail matters to short-term traders. The one-week liquidation map shows concentrations above the current price, near $2,585, between $2,635 and $2,640, and then around $2,740. These are areas where short sellers could be forced to buy back their positions. If the price reached them, the move could accelerate. This is not a forecast, just a map of the areas where the market could run hot.

Hedging on One Side, Regular Buying on the Other

The options market reveals caution. According to CoinDesk, puts have topped the ranking of the most-traded bitcoin options over 24 hours for the second day running. A put gains value when the price falls: it is insurance. Traders are buying protection rather than selling.

At the other end of the market, Strategy continues to buy. The company acquired 250 bitcoins between October 5 and 11 at an average price of $86,194, according to CoinDesk. It now holds 848,250, at an average cost basis of $75,444. This flow supports underlying demand, but it is no match for an overnight cascade.

Platforms and Custody: Crypto's Other Risk

Volatility is not the only danger. Ledger says, according to CoinDesk, that a spy chip found in at least one device sold by CryptoBilis was transmitting wallet keys over the mobile network. The lesson is old but still valid: buy a hardware wallet from the manufacturer or an official reseller—never secondhand or through a marketplace.

On the regulatory side, the SEC proposed new rules on October 1 governing cryptoasset custody by advisers and funds. They would allow these entities to hold their clients' crypto themselves, but only in the absence of an approved custodian, Bitcoin Magazine explains. The regulator is moving forward while Congress blocked the Clarity Act last month.

In Europe, the rule of thumb is simple. Check that your platform has a MiCA license, which can be verified in the ESMA register and on the AMF website. An unlicensed platform gives you no recourse if it freezes withdrawals on an evening of extreme volatility.

Size Your Trades for a Market That Never Sleeps

Crypto trades seven days a week, including overnight. Your stop must therefore be in place before you go to sleep, and your position size must survive a wick you will not see.

Trader B does not predict better than Trader A. They simply accept a small loss when the market proves them wrong.

Also note your liquidation price and its distance from the market price every evening. When that distance falls below the volatility of an ordinary session, you are no longer trading—you are gambling. A trading journal with AI such as Edgyx records your trades automatically: your statistics show what your highly leveraged positions are costing you, and Ora helps you review those sessions.

Key Takeaways

  • Tuesday's shock sent bitcoin below $81,000 and then above $84,000 within a few hours, in the wake of a 5.5% plunge in the Kospi.
  • Leveraged buyers bore most of the liquidation losses; ether was the hardest-hit asset.
  • Below its moving averages and deprived of ETF support, ether remains the weak link; analysts are watching the $2,560–$2,575 zone as a reference.
  • Puts dominate bitcoin options trading: traders are hedging ahead of the U.S. inflation data.
  • Platform and custody risk matter as much as price risk: MiCA authorization, hardware purchased from the right source, and a stop placed before the night begins.