Bitcoinica

Bitcoinica (bitcoinica.com / @bitcoinica)

Bitcoinica was an early Bitcoin trading service best known for offering leveraged (margin) trading (often described as a contract-for-difference / CFD-style product on the BTC/USD price) during Bitcoin’s first major growth period (2011–2013). (en.bitcoin.it)

What it was

• A platform that enabled users to speculate on Bitcoin’s price with leverage, increasing both potential gains and potential losses. (en.bitcoin.it)
• Widely discussed in early Bitcoin communities and at times compared (in prominence/volume) with other early exchanges of the era. (wired.com)

Short history (2011–2013)

• Launched: September 2011 (reported launch date: September 8, 2011). (en.bitcoin.it)
• Major security incidents in 2012: Public reporting describes multiple thefts affecting Bitcoinica, including:
  • A March 2012 incident connected to the Linode hosting compromise (often reported as ~43,000 BTC from services hosted there). (bitcoininsider.org)
  • A May 11, 2012 incident in which 18,547 BTC were reported stolen from Bitcoinica’s hot wallet / servers, after which operations were halted. (arstechnica.com)
  • Later reporting also describes further losses tied to access to a Bitcoinica-related Mt. Gox account while refunds/reconciliation were underway. (bitcoinmagazine.com)
• Outcome: Contemporary accounts describe the service as ultimately shutting down, followed by disputes and unresolved user-loss/refund issues. (wired.com)

Ownership / administration notes (as commonly reported)

• Multiple sources identify the original creator as Zhou Tong (often described as a teenager at the time). (wired.com)
• Later reporting describes a sale/transition and subsequent liquidation/receivership actions in New Zealand. (bitcoinmagazine.com)

Current web presence (checked February 17, 2026)

Identifiers you provided: text Website: https://bitcoinica.com X/Twitter: https://twitter.com/bitcoinica

• bitcoinica.com: When directly fetched on February 17, 2026, it returned “502 Bad Gateway” (i.e., the site was not reachable via a normal page load at that moment). ([]())
• @bitcoinica on X/Twitter: The profile URL exists, but the page content was not retrievable in the tool session used here (likely due to platform access restrictions for automated viewing), so I cannot reliably summarize its current bio/posts/status. (twitter.com)

Related claims / administration portal

There is an active-looking “Bitcoinica Online Claimant Portal Registration” page hosted under a Kroll subdomain, which suggests an ongoing or at least still-hosted claims workflow (status and legitimacy should be independently verified before submitting information). (reg-bitcoinica.ra.kroll.com)