Coldcard Bitcoin Exploit Balloons to $88 Million as Attackers Keep Draining Wallets

Galaxy Research says a third wave of thefts from Coldcard Bitcoin wallets has pushed observed losses to roughly 1,367 BTC across 4,585 addresses.

The top 3

  1. Bybit's $1.5 Billion Breach: The Bybit exchange suffered the largest single crypto theft in history in February 2025, losing approximately $1.5 billion in Ether due to a private key leak in its hot wallet system or compromised workstation.
  2. Ronin Network's $625 Million Exploit: In March 2022, the Ronin Network, an Ethereum sidechain for the game Axie Infinity, suffered a loss of approximately $625 million in Ethereum and USD Coin, an attack later linked to the North Korean Lazarus Group.
  3. Poly Network's $611 Million Theft: In August 2021, Poly Network experienced a hack that resulted in the theft of over $611 million in various cryptocurrencies by exploiting a smart-contract vulnerability, though most of the funds were eventually returned.

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