Upbit Bitcoin (BTC) Volume Falls 25.69% in a Day to 704.9 Billion Won

Turnover Slides Below 1 Trillion Won

By 10:10 a.m. Korea time on Sunday, October 18, the Bitcoin (BTC) price on Upbit, the largest crypto exchange in South Korea, had crawled just 0.11% higher from the previous day, to 110,258,000 won. The marginal gain was not the session's story; turnover was. Upbit Data Lab, the exchange's own statistics portal, put 24-hour trading volume at 704.93 billion won, a fall of 25.69% from a day earlier that took activity below the 1 trillion won line. Cumulative turnover for the day itself stood at just 62.76 billion won when the reading was taken.

XRP climbed 0.17% to 1,753 won and Ethereum (ETH) added 0.18% to 3.255 million won over the same window. None of the three major assets managed a gain of even 1%, and gains that size rarely pull fresh money in on their own. The Upbit composite index, at 11,055.95, rose just 0.10%, and the exchange's altcoin index managed 0.19%, figures that show how little recovery force has followed the market's slide. The rebound followed the steep drop of recent sessions, and prices have since moved in a narrow band.

Selective strength did surface further down the market, and it split token by token. Altcoin action ran in both directions: PUFFER jumped 7.13% and Caldera's ERA token 8.81%, while Worldcoin (WLD) gained 0.45% and Ethena (ENA) 1.18%. The Sandbox (SAND) slipped 2.09% and Gitcoin (GTC) 0.94%. On a weekly view, Injective (INJ) led with a 10.86% advance, ahead of Celestia (TIA) at 10.15%, Basic Attention Token (BAT) at 9.68% and Elsa at 9.32%. None of it gave traders much reason to buy the dip and HODL through it.

Nasdaq's 4.48% Week and the AI Debt Question

The thin bid on Upbit tracked the mood in US equities. The Nasdaq Composite lost 4.48% last week, and the Philadelphia Semiconductor Index fell 11.41%, a slide the market read as risk aversion spilling from stocks into crypto. CoreWeave, an AI cloud provider, dropped 11.91% on October 16, and the concern that spread from it was specific: the debt burden behind AI infrastructure spending, and whether corporate earnings can sustain the build-out. The AI cost debate has even crossed into crypto's own doorstep; our earlier piece on Vitalik Buterin setting Bitcoin mining against AI inference is one marker of that. That doubt has capped rebounds across risk assets, digital ones included, and US technology earnings have become the variable traders watch most closely for crypto's short-term direction.

The coming week turns the question over. From October 19 to 23, about 70 S&P 500 constituents report third-quarter results, with Tesla and Meta Platforms scheduled for October 21. If AI investment profitability concerns ease, crypto sentiment regains a floor; if earnings disappoint or technology shares slide further, volatility in Bitcoin (BTC) and the major altcoins widens again. By turnover, XRP was the session's most traded asset, with SAND, GTC, PUFFER, USDT and Bitcoin filling the top ranks, a mix weighted toward mid-caps and a stablecoin rather than conviction buying of the flagship asset. Domestic demand, the kind traders track through the Kimchi premium, has yet to reassert itself. Until 24-hour turnover climbs back above 1 trillion won, the rebound stays thin on the exchange's own numbers, and the week's first US session will test whether the turnover slide deepens or reverses. Some desks keep a harder downside in view: our earlier coverage of Mike McGlone's $10,000 target for Bitcoin if US stocks fall 20% is one reference.

The $80,761 Floor Under the Range

Our live monitoring put Bitcoin at $81,784, up 0.3% in the hours after the Seoul turnover reading, and the composite scoring frames a narrow range: support at $80,761 scored 98 out of 100, resistance at $82,059 scored 92, so the price sits between lines barely 1.6% apart. Derivatives add two points: a funding rate of 0.0043% and open interest near $15.9 billion, leverage neither crowded nor flushed, while a Fear & Greed reading of 53 keeps sentiment neutral. The sub-1-trillion-won turnover condition has now held through a full 24-hour window, and the 62.76 billion won of daily cumulative volume left no footprint of a crypto whale stepping in. The earnings calendar that opens October 19 decides which side of the range gives first; our Bitcoin technical analysis page tracks the levels daily.