--- title: "Binance hit by suspected $6.3 billion security breach as crypto prices slide" description: "A suspected $6.3 billion security breach at Binance and a Polymarket exploit sent bitcoin and ether lower, CoinDesk reported. Standard Chartered expects…" language: en canonical: "https://whycoinmoves.com/en/events/bitcoin-6-billion-binance-hack-sends-fcc313aac54721" published: 2026-10-30T04:02:57.000Z updated: 2026-10-30T05:03:02.000Z indexable: true --- # Binance hit by suspected $6.3 billion security breach as crypto prices slide A suspected $6.3 billion security breach at Binance and a Polymarket exploit sent bitcoin and ether lower, CoinDesk reported. Standard Chartered expects… Attributed sources: [CoinDesk]() ## Key facts A suspected $6.3 billion security breach at Binance and a Polymarket exploit sent bitcoin and ether lower, CoinDesk reported. Standard Chartered expects crypto prices to stay under pressure before finding a base, according to the outlet. Evidence strength: Single source, 1 publisher group(s) (CoinDesk). After site detection, observed returns were 5 minutes: -0.09% (Oct 30, 2026, 04:02 → Oct 30, 2026, 04:07, UTC; Gate · USDT); 1 hour: +0.57% (Oct 30, 2026, 04:02 → Oct 30, 2026, 05:02, UTC; Gate · USDT) In the preceding 30 days, the 99th percentile of absolute hourly returns was 1.27% (OKX · USDT; cutoff Oct 30, 2026, 04:02, UTC). ## Returns after site detection | Window | Return | BTC | Difference from BTC | Actual sampled interval (UTC) | Source | | --- | --- | --- | --- | --- | --- | | 5 minutes | -0.09% | -0.09% | 0.00 pp | Oct 30, 2026, 04:02 → Oct 30, 2026, 04:07 | Gate · USDT | | 1 hour | +0.57% | +0.57% | 0.00 pp | Oct 30, 2026, 04:02 → Oct 30, 2026, 05:02 | Gate · USDT | ## Historical hourly baseline | Metric | Value | | --- | --- | | Coverage | 100.0% (720/720) | | Median absolute hourly return | 0.14% | | 99th percentile of absolute hourly returns | 1.27% | | BTC beta | 1.00 | | Source / cutoff (UTC) | OKX · USDT / Oct 30, 2026, 04:02 | ## Claims and open questions - CoinDesk reported that a suspected $6.3 billion Binance security breach and a Polymarket exploit were followed by declines in bitcoin and ether. - Standard Chartered said crypto prices may remain under pressure before finding a base, CoinDesk reported. - What mechanism the suspected Binance breach involved and which assets or wallets were affected, which Binance or on-chain data would confirm. - What the Polymarket exploit consisted of and how much was lost, which Polymarket or on-chain records would confirm. ## Source evidence - [$6 billion Binance hack sends bitcoin, ether tumbling; Standard Chartered expects more pain]() — CoinDesk; published Oct 30, 2026, 04:00; received Oct 30, 2026, 04:02 (UTC). ## Recent BTC events and market reactions - [Binance hacker moves $1.4 billion of bitcoin into 19 wallets]() — Published Oct 30, 2026, 04:50 (UTC) · Single source (1 publisher) · Security · 5m -0.07% / 1h +0.28% - [Binance confirms hack with estimated $6.3 billion total impact]() — Published Oct 30, 2026, 04:05 (UTC) · Single source (1 publisher) · Security · 5m +0.18% / 1h +0.67% - [Strategy reports record $20.91 billion operating income for Q3 2026]() — Published Oct 29, 2026, 23:18 (UTC) · Single source (1 publisher) · General news · 5m -0.07% / 1h -1.96% - [Bitcoin falls below $79,000 as suspected Binance hack roils markets]() — Published Oct 29, 2026, 23:06 (UTC) · Multiple publishers (3 publishers) · Security · 5m +0.01% / 1h -1.21% - [Bank of Russia approves NAUFOR as first self-regulatory body for crypto exchanges]() — Published Oct 29, 2026, 15:03 (UTC) · Single source (1 publisher) · General news · 5m +0.14% / 1h +0.70% - [Full coin archive]() ## Research for this archive - [Crypto hacks and price impact: Bybit and Cetus case studies]() - [Why is crypto moving? How to check the evidence behind a price explanation]() - [Altcoin beta to Bitcoin: BTC, ETH, SOL and DOGE hourly returns]() - [Will Bitcoin go back up? Every crash since 2011 and its recovery time]() Evidence levels describe source coverage, not the probability that a report is true. Price moves and their timing cannot establish a cause; minute samples show an observed interval and alert thresholds are heuristics. Explanations are model-assisted, with citations and figures checked. Source titles stay in their original language; full articles are not republished. [Methods and limitations]()