Bitcoin Fell Below $4,300 as the Crypto Selloff Deepened

Bitcoin fell below $4,300 on November 20, 2018, reaching its lowest Bitstamp price since October 2017 as a broad cryptocurrency selloff accelerated.

A contemporaneous Reuters report recorded an intraday Bitstamp low of $4,327 and said bitcoin had lost 25% within one week. By the report’s mid-afternoon observation, bitcoin had recovered to approximately $4,750 on that exchange. CoinMarketCap’s separate November 20 historical snapshot placed bitcoin at $4,451.87, down 8.90% over its stated 24-hour window and 29.96% over seven days.

Those figures describe different observation times and methodologies. Bitcoin traded continuously across fragmented venues, without a consolidated closing auction. The Reuters observations were specific to Bitstamp; CoinMarketCap aggregated markets under a methodology whose surviving snapshot does not disclose every constituent trade or its precise daily cutoff.

Losses spread across major assets

CoinMarketCap’s snapshot showed that the decline extended well beyond bitcoin. Ether was listed at $130.34, down 12.56% over 24 hours; XRP was $0.4347, down 9.76%; and bitcoin cash was $223.70, down 24.20%. The same table showed bitcoin cash down 56.91% over seven days, the largest weekly loss among the four assets.

Reported 24-hour bitcoin volume was $8.43 billion. That was an aggregate of markets included by CoinMarketCap, not audited global turnover or the volume of a single exchange. Market capitalization was reported at $77.40 billion, calculated from the displayed price and a reported circulating supply of approximately 17.39 million BTC. Market capitalization did not measure cash withdrawn from the asset or realized investor losses.

Reuters attributed possible explanations to named traders and market makers, including leveraged selling on Asian exchanges and concern surrounding the Bitcoin Cash split. Those were contemporaneous assessments, not proof of a single cause. Broader financial markets were also falling, further limiting any clean causal inference.

The Bitcoin Cash split reached an operational decision

The protocol dispute supplied important event-day context. Bitcoin Cash had divided into incompatible chains on November 15. On November 20, Coinbase said it had observed community consensus that the ABC chain would retain the Bitcoin Cash designation and BCH ticker on its platform. Coinbase cited ABC’s higher hash rate and longer proof-of-work chain.

Coinbase prepared to resume limited BCH trading on its professional venues but kept sends and receives offline while monitoring for chain reorganizations. It also said it was evaluating the competing SV chain and intended eventually to support withdrawals if conditions allowed. These were Coinbase’s operational decisions and risk assessments, not a universal adjudication binding every exchange, wallet or network participant.

The timing made the fork a plausible source of market anxiety, especially because BCH itself showed the sharpest listed decline. It did not establish that the fork caused bitcoin’s exact price path or the losses in unrelated assets.

Institutional infrastructure was still unfinished

Intercontinental Exchange supplied a second institutional marker on November 20. ICE Clear US notified clearing members that the physically settled Bakkt Bitcoin (USD) Daily Futures contract was expected to begin trading on January 24, 2019, subject to regulatory approval. Each contract was designed to call for delivery of one bitcoin held in the Bakkt Warehouse.

ICE said the revised timeframe provided additional time for customer and clearing-member onboarding and warehouse preparation. The notice demonstrated continuing work on institutional market infrastructure, but it did not mean the contract was approved, trading or providing liquidity on November 20.

The defensible event-day conclusion is narrow: bitcoin set a new 2018 low on Bitstamp, large crypto assets declined across CoinMarketCap’s measurement window, Coinbase made a consequential post-fork designation, and a planned institutional futures launch remained conditional. The records establish the selloff and surrounding uncertainty, not a single verified catalyst.