private-key-compromise

Chris Larsen is the co-founder and Executive Chairman of Ripple, one of the most prominent figures in the XRP ecosystem. On January 30, 2024, attackers drained an estimated 213–283 million XRP (valued at $112.5–$150 million) from his personal cryptocurrency accounts — not Ripple corporate wallets — in what became the largest individual crypto theft of 2024. A U.S. government forfeiture complaint filed in March 2025 linked the breach to the 2022 LastPass password manager hack, alleging that private keys had been stored in an online vault subsequently compromised by attackers.

Tapioca DAO is an omnichain DeFi money market built on LayerZero, offering a CDP stablecoin (USDO) and isolated lending markets (Singularity/Big Bang) across Arbitrum and BNB Chain. On October 18, 2024, the protocol suffered a critical security breach when a team member was targeted by a social engineering attack attributed to North Korea's Contagious Interview campaign, resulting in private key compromise, drainage of TAP token vesting contracts, and the minting of 5 quintillion USDO. Approximately $4.4–4.7 million was stolen before a partial counter-exploit recovered roughly 996 ETH (~$2.7 million), leaving the protocol treasury down approximately 45% and the TAP token price collapsed over 95%.

BtcTurk is Turkey's oldest and largest centralized cryptocurrency exchange, founded in 2013 in Istanbul. The exchange has suffered two major hot wallet breaches in 14 months — approximately $55 million stolen in June 2024 and approximately $48–$49 million in August 2025 — both attributed to private key compromise, establishing a pattern of repeated critical security failures. Despite operating under Turkish regulatory frameworks (CMB and MASAK) and maintaining cold wallet protections, the exchange's inability to prevent a second near-identical attack within a year raises serious concerns about the adequacy of its security controls.

JRNY Crypto (real name allegedly Tony Spark) is a pseudonymous cryptocurrency and NFT influencer operating since 2017, with over 760,000 followers on X and 590,000 YouTube subscribers at peak activity. ZachXBT flagged the account in November 2024 after approximately $4 million in crypto assets were drained from associated wallets in a suspected private key compromise; JRNY did not publicly acknowledge the incident. Separate community-sourced allegations include undisclosed paid promotions, a paid strategic advisory role at BSC launchpad Seedify that critics allege was not consistently disclosed to audiences, and criticism over the JRNY Club and Planet Xolo NFT projects failing to meet roadmap commitments.

CoinEx is a centralized cryptocurrency exchange that suffered a major hot wallet breach on September 12, 2023, with losses estimated between $54 million and $70 million across multiple blockchains. On-chain investigators ZachXBT and Elliptic attributed the attack to the Lazarus Group (TraderTraitor), a North Korean state-sponsored threat actor, based on wallet address overlap with the contemporaneous Stake.com hack. Stolen proceeds were subsequently laundered in part through the Sinbad Bitcoin mixer, which was sanctioned by the U.S. Treasury's OFAC on November 29, 2023.

CoinSpot is an Australian cryptocurrency exchange founded in 2013 by Russell Wilson and headquartered in Melbourne. It is registered with AUSTRAC as a Digital Currency Exchange (since May 2018) and holds ISO 27001 certification. On November 8, 2023, the platform suffered a suspected private key compromise resulting in the loss of approximately 1,283 ETH (~$2.4 million USD), with stolen funds bridged to Bitcoin via THORChain and Wan Bridge. No customer funds were reported lost in the incident.