---
title: "2026-10-29にビットコイン Bitcoin (BTC)はなぜ4.1%下落したのか？"
language: ja
canonical: "https://whycoinmoves.com/ja/coins/bitcoin/2026-10-29"
date: 2026-10-29
---

# 2026-10-29にビットコイン Bitcoin (BTC)はなぜ4.1%下落したのか？

2026-10-29 (UTC)、BTCはGate · USDTで約$81,347.90から$77,981.80（-4.14%）へ推移し、高安レンジは$77,912.30 – $81,965.50でした。 他の追跡銘柄の大半が同じ方向に動いており、市場全体の値動きとみられます。 これは過去29日間でBTCの最大の24時間下落です。 下のタイムラインにBTCの報道が20件あります：最大の1時間変動の前に18件、変動中または後に2件。タイミングだけでは変動原因を証明できません。

- Day open / close: $81,347.90 → $77,981.80 (24 hourly candles, Gate · USDT)
- Day range: $77,912.30 – $81,965.50
- 過去1ヶ月との比較: 過去29日間で最大の24時間下落; 2026-10-30 00:00 UTCまでの24時間で-4.14%、通常の1日(0.8%)の5.1×。
- 30日間レンジ: 高値から-10.6%・安値から+0.1%; 同一取引所の時間足高値・安値基準
- 24時間出来高倍率: 1.6×; 直近30日間の日次平均比
- 無期限先物データ: ファンディング率 プラス · 建玉 増加; OKX無期限先物 BTC-USDT-SWAP

2026-10-30 00:00 UTCまでの24時間のGate · USDT時間足データから算出。

## 2026-10-29前後のBTCタイムライン

最大の1時間確定変動：-2.46%、2026-10-29 20:00–21:00 (UTC)。

- 2026-10-28 03:00 UTC (最大の1時間変動の前): [Datavault AI says it cannot withdraw its Bitcoin from Biconomy, shares fall 50%](<https://whycoinmoves.com/en/events/bitcoin-datavault-ai-stock-plummets-50-5585537ca2ec8e>) (English) · The Block — Datavault AI disclosed in an Oct. 26 Form 8-K that it has been unable to withdraw its Bitcoin from Biconomy since June, Decrypt reported, and its shares fell more than 50% to close at $0.06.
- 2026-10-28 04:00 UTC (最大の1時間変動の前): [Bitcoin Core fixes memory-exhaustion flaw on non-Linux nodes](<https://whycoinmoves.com/en/events/bitcoin-unbounded-memory-growth-through-tcp-ebb349a4ff0ddb>) (English) · Bitcoin Core — Bitcoin Core released fixes for a Medium-severity flaw in which a malicious peer could send TCP urgent data to exhaust memory on nodes running the select() socket backend, which Bitcoin Core says affects Windows, macOS and BSD but not…
- 2026-10-28 04:00 UTC (最大の1時間変動の前): [Bitcoin Core discloses undo file overflow bug and fixes it in new releases](<https://whycoinmoves.com/en/events/bitcoin-undo-file-overflow-under-extreme-f1ab709d188592>) (English) · Bitcoin Core — Bitcoin Core disclosed a low-severity bug that lets a miner corrupt other nodes' undo data, causing them to shut down if a reorg of specific blocks follows, or on Windows and 32-bit systems once the affected blocks connect.
- 2026-10-28 07:57 UTC (最大の1時間変動の前): [Bitcoin ETF inflows climb to $176M as BTC rebounds above $80K](<https://whycoinmoves.com/en/events/bitcoin-bitcoin-etf-inflows-climb-176m-39e18b34caec17>) (English) · Cointelegraph — The report said the funds took in $286 million over two days, narrowing October's net outflows to $26 million, while the Crypto Fear & Greed Index remained neutral.
- 2026-10-28 11:32 UTC (最大の1時間変動の前): [Bitcoin rebounds above $81,000 as Asian chip rally lifts crypto markets](<https://whycoinmoves.com/en/events/bitcoin-bitcoin-rebounds-above-81-000-7770b43823e761>) (English) · CoinDesk — Bitcoin rose about 0.8% since midnight UTC to $81,400 on Monday, up from below $80,000 on Tuesday, CoinDesk reported. Ether gained 0.9% and the CoinDesk Memecoin Index advanced 1.3%, while pepe added 9%. U.S.
- 2026-10-28 13:46 UTC (最大の1時間変動の前): [Itaú registers with Brazil's central bank as crypto intermediary and custodian](<https://whycoinmoves.com/en/events/bitcoin-brazilian-banking-giant-itau-formalizes-69d0b18aaaa920>) (English) · Bitcoin Magazine — Itaú Unibanco, Brazil's largest private bank, has formally registered with the Central Bank of Brazil to intermediate and custody crypto assets under the country's new licensing rules, Bitcoin Magazine reported.
- 2026-10-28 15:07 UTC (最大の1時間変動の前): [Bitwise lifts 2036 bitcoin price target to about $1.6 million](<https://whycoinmoves.com/en/events/bitcoin-bitwise-raises-bitcoin-target-1-c2aa835fbc64ba>) (English) · Bitcoin Magazine — Bitwise Asset Management raised its 2036 base-case bitcoin price target to $1,599,766 from $1.3 million a year earlier, Bitcoin Magazine reported, citing the firm's 2027 long-term capital market assumptions. Bitwise projects a 34.3%…
- 2026-10-28 15:32 UTC (最大の1時間変動の前): [Strategy shareholders approve daily dividends on four preferred stocks](<https://whycoinmoves.com/en/events/bitcoin-strategy-mstr-shareholders-approve-daily-5877d3d7a0495c>) (English) · Bitcoin Magazine — Strategy shareholders approved an amendment allowing its STRF, STRC, STRK and STRD preferred stocks to accrue dividends every calendar day, including weekends and holidays, the company announced.
- 2026-10-28 17:43 UTC (最大の1時間変動の前): [2026 crypto hack losses reach $2.35 billion, report shared with Bitcoin Magazine says](<https://whycoinmoves.com/en/events/bitcoin-centralized-exchange-defi-losses-dominate-14712c83169b50>) (English) · Bitcoin Magazine — A Lightning.news report shared with Bitcoin Magazine puts net 2026 crypto hack losses at roughly $2.35 billion after freezes and returns, with September alone accounting for about $768 million.
- 2026-10-28 21:13 UTC (最大の1時間変動の前): [APX plans bitcoin-backed mortgages in Canada](<https://whycoinmoves.com/en/events/bitcoin-bitcoin-backed-mortgages-are-coming-89e610efb45093>) (English) · CoinDesk — APX is preparing to offer bitcoin-backed mortgages in Canada, CoinDesk reported.
- 2026-10-29 01:12 UTC (最大の1時間変動の前): [Analysts say Fed's hawkish rate hold keeps pressure on Bitcoin](<https://whycoinmoves.com/en/events/bitcoin-bitcoin-faces-fresh-pressure-after-53734ddc88f743>) (English) · Cointelegraph — Cointelegraph reported that the Federal Reserve's hawkish rate hold keeps pressure on Bitcoin, with traders pricing in a 78% chance of a December rate hike.
- 2026-10-29 10:04 UTC (最大の1時間変動の前): [Thai Supreme Court rules bitcoin counts as property in robbery case](<https://whycoinmoves.com/en/events/bitcoin-thai-supreme-court-rules-bitcoin-570ec153e33ce4>) (English) · CoinDesk — Thailand's Supreme Court ruled that bitcoin is property, saying it has a market price, can be cashed out and can be held by the public, CoinDesk reported. The court upheld a 10-year sentence for a man who helped the robbers in the case.
- 2026-10-29 13:30 UTC (最大の1時間変動の前): [Tether's USDT to launch on Bitcoin with privacy and Lightning payments](<https://whycoinmoves.com/en/events/bitcoin-private-fast-usdt-coming-bitcoin-1a05fc6f9431d6>) (English) · Cointelegraph — Cointelegraph reported that USDT is coming to Bitcoin, describing the rollout as offering privacy and Lightning-fast payments.
- 2026-10-29 13:36 UTC (最大の1時間変動の前): [Bitcoin Magazine explains methods for calculating Bitcoin per share](<https://whycoinmoves.com/en/events/bitcoin-understanding-various-bitcoin-per-share-455274ed4b9c9a>) (English) · Bitcoin Magazine — Bitcoin Magazine published an explainer by Allard Peng on how to calculate bitcoin per share for Bitcoin treasury companies, laying out three measures: raw Bitcoin Per Share, Bitcoin Per Assumed Diluted Share and Net Bitcoin Per Share.
- 2026-10-29 13:49 UTC (最大の1時間変動の前): [HTX agrees to leave UK in settlement with FCA over crypto marketing](<https://whycoinmoves.com/en/events/bitcoin-crypto-exchange-htx-agrees-leave-a77613a39ae9f4>) (English) · Bitcoin Magazine — HTX is leaving the UK under a confidential settlement with the Financial Conduct Authority, ending the regulator's first enforcement case over crypto financial promotions, Bitcoin Magazine reported.
- 2026-10-29 13:55 UTC (最大の1時間変動の前): [Quantum model reduces hardware needed to break bitcoin keys by 17 times](<https://whycoinmoves.com/en/events/bitcoin-new-quantum-model-slashes-hardware-96ec58ca3406d7>) (English) · CoinDesk — CoinDesk reports that a new quantum model by Alice & Bob slashes the hardware required to break bitcoin keys by 17 times, bringing a potential attack closer to reality and increasing pressure to adopt quantum-resistant security sooner.
- 2026-10-29 14:15 UTC (最大の1時間変動の前): [Swiss spot bitcoin ETF gains international access on SIX](<https://whycoinmoves.com/en/events/bitcoin-why-switzerland-s-first-genuine-10ecd1266aca17>) (English) · CoinDesk — CoinDesk reports that Switzerland's first genuine spot bitcoin ETF has won international access through SIX Swiss Exchange, and that FINMA explained why it approved the fund and whether ether and solana ETFs could follow.
- 2026-10-29 15:03 UTC (最大の1時間変動の前): [Bank of Russia approves NAUFOR as first self-regulatory body for crypto exchanges](<https://whycoinmoves.com/en/events/bitcoin-russia-approves-securities-group-oversee-87a7a164bdc4ca>) (English) · Bitcoin Magazine — The Bank of Russia approved NAUFOR, the National Association of Securities Market Participants, as the country's first self-regulatory organization for crypto exchanges and digital depositories, Bitcoin Magazine reported, citing Interfax.
- 2026-10-29 23:06 UTC (最大の1時間変動の後): [Bitcoin falls below $79,000 as suspected Binance hack roils markets](<https://whycoinmoves.com/en/events/bitcoin-bitcoin-price-slides-below-79-2a27845f43c1d7>) (English) · Bitcoin Magazine — Bitcoin dropped below $79,000 as reports of a suspected multibillion-dollar hack at Binance spread, Bitcoin Magazine reported, citing outflows of up to $5.8 billion. Tether CEO Paolo Ardoino said the company froze more than 1.567 billion…
- 2026-10-29 23:18 UTC (最大の1時間変動の後): [Strategy reports record $20.91 billion operating income for Q3 2026](<https://whycoinmoves.com/en/events/bitcoin-strategy-mstr-posts-record-operating-dfa86d832cd858>) (English) · Bitcoin Magazine — Strategy posted a record $20.91 billion in operating income for the third quarter of 2026, mostly from a paper gain on its bitcoin stack, Bitcoin Magazine reported. Net income was $19.53 billion, or $44.75 per diluted share, as 848,517…

Prices, market readings and reports are shown side by side; timing alone does not show what caused a move.

## 2026-10-29 同日の価格変動銘柄（UTC）

- [Quack AI (Q) -29.02%](<https://whycoinmoves.com/ja/coins/quack-ai/2026-10-29>)
- [Pons (PONS) -21.29%](<https://whycoinmoves.com/ja/coins/pons/2026-10-29>)
- [Ethena (ENA) -16.29%](<https://whycoinmoves.com/ja/coins/ethena/2026-10-29>)
- [ニアプロトコル NEAR Protocol (NEAR) -14.24%](<https://whycoinmoves.com/ja/coins/near/2026-10-29>)
- [Raydium (RAY) -12.52%](<https://whycoinmoves.com/ja/coins/raydium/2026-10-29>)

[ビットコイン Bitcoin (BTC) price and news](<https://whycoinmoves.com/ja/coins/bitcoin>)
[Methods and limitations](<https://whycoinmoves.com/ja/methodology>)
