Huobi Ends CNY Trading for Mainland China Users
The exchange’s final renminbi transaction deadline marked the operational culmination of China’s 2021 campaign against cryptocurrency trading services.
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2021.
365 source-dated archive files document the cryptocurrency record for 2021. Each article displays its historical event date and separate actual publication time.
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MicroStrategy disclosed a $94.2 million bitcoin purchase funded by share sales
The enterprise-software company added approximately 1,914 BTC and completed a $1 billion equity program, further linking its corporate treasury to bitcoin and public-market financing.
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Polygon Disclosed Critical MATIC Bug and Emergency Network Upgrade
The flaw exposed more than 9.27 billion MATIC before a quiet December 5 upgrade, while an attacker extracted 801,601 tokens before the fix took effect.
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Bitcoin fell below $48,000 as a year-end selloff erased its holiday rebound
Bitcoin lost about 6% across documented December 28 measurement windows, while ether and most large-cap cryptoassets retreated with it.
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Iran Orders Licensed Crypto Miners Off the Grid During Winter Power Squeeze
The renewed electricity curtailment exposed how licensed proof-of-work mining remained vulnerable to national grid policy and seasonal energy demand.
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MATIC Gained 9.1% as Holiday Trading Thinned
Polygon’s token approached $2.88 while Kraken’s total spot volume ran at about 43% of its 30-day average, limiting confident claims about the rally’s cause.
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Bitcoin held near $50,000 as Kraken’s holiday volume sank
Kraken recorded $456.3 million in spot trading on December 25, 2021—approximately 68% below its reported 30-day average—limiting what bitcoin’s muted price move could establish about broader demand.
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Binance listed TerraUSD as LUNA briefly crossed $100
The UST trading launch expanded access to Terra’s algorithmic stablecoin while LUNA and the network’s measured DeFi value reached records.
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Marathon Maps 23.3 EH/s Expansion With Record Bitmain Order
The listed Bitcoin miner projected a 199,000-machine fleet, although its event-day announcement omitted the order’s price and unit count.
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SEC Rejected Valkyrie and Kryptoin Spot-Bitcoin Listing Proposals
The paired orders preserved the divide between futures-based bitcoin funds and products designed to hold bitcoin directly.
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Kraken Acquired Staked to Add Non-Custodial Staking Infrastructure
The undisclosed acquisition extended the exchange into infrastructure for proof-of-stake participants that wanted to retain custody of their assets.
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Stronghold disclosed deals for 9,080 bitcoin miners
The Nasdaq-listed miner paired approximately 826 PH/s of planned capacity with an equipment-financing agreement for as much as $53.952 million from NYDIG.
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Grim Finance Disclosed $30 Million-Plus Vault Exploit
The Fantom yield optimizer paused its vaults after an attacker exploited an unprotected deposit path, exposing a damaging gap in an earlier security audit.
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Polkadot’s First Five Parachains Began Producing Blocks
Acala, Moonbeam, Parallel Finance, Astar and Clover joined the Relay Chain after winning slot auctions, activating the architecture at the center of Polkadot’s multichain design.
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Adidas Took Originals On-Chain With Its First NFT Drop
The 30,000-token collection minted out within hours, generating calculated gross consideration of 5,924 ETH while exposing access and transaction-fee problems.
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Consensys Launched Enterprise Rollups With Mastercard Support
The modular software brought zero-knowledge scaling and transaction privacy to permissioned Ethereum applications, although its performance figures remained vendor-supplied.
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Fed doubled its taper pace as bitcoin bounced after the policy decision
The December 15, 2021 decision accelerated the end of Federal Reserve asset purchases, shifted the expected path for interest rates and tested cryptocurrency markets’ sensitivity to monetary policy.
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Senate stablecoin hearing exposed a divide over bank-only issuance
Lawmakers agreed that stablecoins needed safeguards but split over whether issuers should be limited to insured banks or allowed several regulatory paths.
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Binance Singapore Withdrew Its Crypto Licence Application
The operator of Binance.sg abandoned its Monetary Authority of Singapore application and began winding down the local trading platform, exposing the limits of crypto exchanges’ transitional regulatory status.
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AscendEX disclosed multichain hot-wallet breach as losses were estimated at $77.7 million
The exchange suspended fund movements and promised to cover affected customers after unauthorized transfers spanning several blockchain networks.
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Bitcoin difficulty jumped 8.33% as mining recovery approached its May peak
The protocol adjustment at block 713,664 brought mining difficulty within 3.40% of its May 2021 high, marking a substantial recovery from July’s disruption.
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Bitcoin’s $50,000 inflation bounce faded as U.S. CPI reached 6.8%
Bitcoin briefly crossed $50,000 after the November inflation report, but Kraken’s December 10 session record showed the cryptocurrency finishing lower as the broader market weakened.
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MicroStrategy disclosed $82.4 million bitcoin purchase funded by share sales
The listed software company added approximately 1,434 BTC while issuing 119,828 shares, further connecting its bitcoin treasury to public capital markets.
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Six crypto executives faced Congress over rules for digital assets
The House Financial Services Committee examined exchanges, stablecoins and consumer safeguards as industry leaders pressed for clearer, tailored regulation.
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Ubisoft announced Tezos-based NFTs for Ghost Recon Breakpoint
The videogame publisher’s Quartz experiment put transferable blockchain tokens inside a major PC title, although its restricted beta had not opened on December 7, 2021.
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CME launched Micro Ether futures with a one-tenth-ether contract
The cash-settled contract reduced the unit size of CME’s existing Ether futures by a factor of 500, widening access to regulated hedging without requiring custody of ether.
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BitMart Confirmed $150 Million Hot-Wallet Breach and Froze Withdrawals
The exchange’s initial estimate differed from PeckShield’s roughly $196 million valuation, leaving the scale and cause unresolved as customers waited for access to their assets.
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Bitcoin Plunged Nearly 22% as Leverage Unwound Across Crypto Markets
Bitcoin fell below $42,000 on Bitstamp before recovering above $49,000, exposing the interaction among fragmented liquidity, weekend trading and leveraged derivatives.
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Bitcoin Slid 5.10% to $53,598 in December 3 Selloff
CoinMarketCap’s 24-hour snapshot showed a broad crypto retreat, while a separate Reuters observation placed bitcoin at $53,435.90 at 22:04 GMT.
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BadgerDAO Pauses Contracts After Front-End Attack Drains User Funds
A malicious approval campaign targeting BadgerDAO’s web interface led to unauthorized withdrawals valued at roughly $120.3 million in an early security estimate, exposing a critical risk outside DeFi smart contracts.