What BigONE is
BigONE is a digital asset trading platform launched in 2017, historically tied to the Chinese crypto ecosystem and today attributable to an offshore corporate structure (2025 reports describe it as registered in the Seychelles, with operational headquarters in Singapore). It offers spot trading on the main pairs and claims a 100% reserve on user assets. In July 2025 it was at the centre of the most serious incident in its history: a software supply-chain attack that drained its hot wallets on five blockchains for around 27 million dollars. (Verified: September 2026)
Regulation and licences
- MiCA: NO — BigONE does not appear among the CASPs authorised in the ESMA register: since 01/07/2026 it cannot legally offer crypto services to EU clients. It is not a regulated option and European protections do not apply. (Verified: September 2026)
Security
- 16/07/2025 — supply-chain attack worth ~27 million dollars: an attacker compromised the backend infrastructure (CI/CD and server management channels), disabling security controls and authorising illegitimate withdrawals from the hot wallets on Bitcoin, Ethereum, BSC, Solana and Tron — without stealing the private keys. Estimated haul: 121 BTC, 350 ETH, 1,800 SOL, 9.69 billion SHIB, 538,000 DOGE and ~8.5 million in USDT. BigONE confirmed the attack, stated the private keys were safe and announced full coverage of the losses from its own reserves. (Verified: September 2026)
- Allegations over the origin of flows: after the hack, on-chain investigator ZachXBT claimed the platform had processed significant volumes linked to scams (romance scams and "pig butchering"). These are detailed public allegations, but not a judicial finding. (Verified: September 2026)
Alternatives
For those who want to operate with platforms authorised in the EU:
FAQ
- Is BigONE safe after the 2025 hack? The exchange covered the losses of the July 2025 attack and the private keys do not appear to have been compromised; it nonetheless remains an offshore platform without EU authorisation, and therefore without MiCA protections for European users.
- Is BigONE legal in the EU? It is not authorised as a CASP under MiCA: since 01/07/2026 it cannot legally offer services to EU clients.
Verified sources
- https://www.halborn.com/blog/post/explained-the-big-one-hack-july-2025
- https://cryptonews.com/news/bigone-exchange-suffers-supply-chain-attack-losses-exceed-27m/
- https://www.coinspeaker.com/bigone-exchange-hacked-27m-scam-processing/
- https://www.banklesstimes.com/articles/2025/07/16/bigone-exchange-suffers-27m-supply-chain
HQ OF THE BIGONE
160 Changi Rd, Singapore 419728
CONTACTS OF THE BIGONE
All images, branding and wording are copyright BigONE. All content on this page is used for informational purposes only. Spaziocrypto has no affiliation or relationship with the company mentioned on this page.
