Incidents & Turning Points

Mt.Gox, Silk Road, The DAO, FTX — a record of the major events in Bitcoin's ecosystem.

5 min readLast updated: August 15, 2026

Key points

This article chronicles the major incidents and regulatory turning points in Bitcoin's history — the Silk Road takedown, the Mt.Gox collapse, The DAO hack, the Block Size War, and the FTX collapse — along with the lessons each left behind, from "not your keys, not your coins" to the criminal prosecution of privacy-tool developers.

Silk Road (2011–2013)

Silk Road was a dark web anonymous marketplace founded in 2011 by "Dread Pirate Roberts" (Ross Ulbricht). Bitcoin was its sole payment method.
In October 2013, the FBI shut down the site and arrested Ulbricht. Approximately 144,000 BTC ($28.5 million at the time) were seized.
Silk Road cemented Bitcoin's image as "criminal money," but simultaneously proved that Bitcoin functions as a censorship-resistant value transfer system.
The seized bitcoins were later auctioned by the U.S. Marshals Service, notably purchased in bulk by venture capitalist Tim Draper.
This case shifted perceptions of Bitcoin privacy. It demonstrated that blockchain analysis makes Bitcoin transactions traceable, becoming widely recognized through this incident.

The Full Mt.Gox Story (2014)

Mt.Gox was founded in 2010 and at its peak processed roughly 70% of all Bitcoin transactions worldwide. Originally a Magic: The Gathering Online Exchange (hence the name).
In February 2014, it announced the loss of approximately 850,000 BTC ($450 million at the time, tens of billions at current prices). A combination of internal mismanagement and hacking was blamed.
The event's lasting lesson: "Not your keys, not your coins" — if you don't control the private keys, you don't truly own the coins. This principle became widespread.
Former CEO Mark Karpelès stood trial in Japan, found not guilty of embezzlement but guilty of data manipulation.
In 2024, nearly a decade later, creditor repayments began. They cover roughly 140,000 BTC and are proceeding in stages, including in-kind returns (the repayment deadline has been extended several times and distributions are ongoing). The incident became a turning point that fundamentally changed security standards across the entire crypto industry.

The DAO Hack & Ethereum's Split (2016)

The DAO was a decentralized investment fund on Ethereum that raised ~$150 million (about 14% of all ETH supply at the time) in May 2016.
In June 2016, a smart contract vulnerability was exploited, draining ~3.6 million ETH (~$50 million).
This event's relevance to Bitcoin lies in the philosophical debate over "immutability." Ethereum hard-forked to reverse the attack, splitting into Ethereum (reversed) and Ethereum Classic (unchanged).
The Bitcoin community viewed this as a lesson in why blockchain immutability matters. The consensus that a similar rollback is inconceivable in Bitcoin forms part of the network's value proposition.

The Block Size War (2015–2017)

The most intense internal dispute in Bitcoin's history. The community split over how to expand beyond the 1MB block size limit.
"Big blockers" (Roger Ver, Jihan Wu, et al.): Directly increase block size via hard fork for on-chain scaling.
"Small blockers" (Gregory Maxwell, Pieter Wuille, et al.): SegWit (soft fork) + Layer 2 solutions like Lightning Network.
August 1, 2017: Bitcoin Cash (BCH) hard-forked. Later that month, SegWit activated on Bitcoin.
This dispute crystallized the fundamental question of "who governs Bitcoin?" The outcome proved that node operators (users) hold ultimate decision-making power (UASF: User Activated Soft Fork).

A History of Exchange Hacks

Bitfinex (2016): ~120,000 BTC (~$72 million) stolen. In 2022, the U.S. DOJ recovered $3.6 billion — at the time, the largest crypto-related seizure on record.
Coincheck (2018): ~$530 million worth of NEM (XEM) drained from a Japanese exchange. Poor hot wallet management was the cause, triggering stricter FSA regulations.
Binance (2019): ~7,000 BTC (~$40 million) stolen through phishing and malware. User funds were covered by the SAFU fund.
Every one of these incidents was an exchange security failure — the Bitcoin protocol itself has never been hacked.
Lesson: Don't keep large amounts of bitcoin on exchanges. Self-custody with hardware wallets or multisig.

The FTX Collapse (2022)

In November 2022, FTX — the world's second-largest crypto exchange — collapsed. CEO Sam Bankman-Fried was arrested for misappropriating customer funds.
Approximately $8 billion in customer funds disappeared, caused by opaque fund flows with sister company Alameda Research.
The entire crypto market crashed, with Bitcoin falling to ~$16,000. The "crypto winter" deepened.
FTX once again proved the importance of "Not your keys, not your coins" and accelerated discussions around Proof of Reserves and custody regulations.
Bankman-Fried was sentenced to 25 years in prison in 2024.

Mt.Gox — 10-Year Creditor Repayment (2024–2026)

Nearly a decade after Mt.Gox's 2014 collapse, the Japanese civil rehabilitation proceedings culminated in creditor repayments beginning in July 2024.
Total repayment was approximately 142,000 BTC and 143,000 BCH (Bitcoin Cash, originating from the 2017 hard fork).
Creditors could choose between cash and in-kind (actual BTC/BCH) repayment. Most chose in-kind.
At the time of the collapse (~$450/BTC), the holdings represented a fraction of 2024 market value — many creditors became accidental long-term HODLers with 100x+ returns.
The large-scale return was feared as sell pressure, but most was held and the market impact was muted.
Trustee Nobuaki Kobayashi led the decade-long complex international legal and technical work, setting a landmark case for crypto asset bankruptcy proceedings.

Privacy Tool Prosecutions (2024)

April 24, 2024: The U.S. DOJ arrested two operators of Samourai Wallet on charges of "unlicensed money transmission" and "money laundering conspiracy." Their CoinJoin service "Whirlpool" was the focus.
The service never held user keys — operators argued they never held customer funds — but prosecutors interpreted the overall service flow as money transmission.
Same year: Wasabi Wallet (operated by ZKSNACKs) withdrew from the U.S. market. Trezor disabled its CoinJoin feature for U.S. users.
August 2023: Tornado Cash (an Ethereum privacy mixer) developer Roman Storm was similarly indicted and arrested (a 2025 jury convicted him on the unlicensed-money-transmitting conspiracy count and deadlocked on the rest) — setting the precedent that "writing privacy-protecting code" may itself be illegal.
In the Bitcoin community, the collision between "privacy is not a crime" and regulators' view of "privacy tools = money-laundering facilitation" has become sharp. The two operators pleaded guilty in July 2025 (the money-laundering conspiracy charge was dropped, leaving the unlicensed money-transmitting charge) and in November 2025 were sentenced to five and four years in prison respectively. Similar legal battles are expected to continue.

Regulatory Milestones

2013: U.S. Treasury's FinCEN issued guidance for Bitcoin businesses — one of the first major government actions recognizing Bitcoin within a regulatory framework.
2017: Japan amended its Payment Services Act to legally define crypto assets (then called "virtual currencies") and introduced the world's first licensing system.
2021: El Salvador adopted Bitcoin as legal tender — the first nation-level adoption.
2023: The EU adopted MiCA (Markets in Crypto-Assets) — a comprehensive regulatory framework for crypto assets.
2024: The U.S. SEC approved spot Bitcoin ETFs. BlackRock, Fidelity, and other majors entered, bringing tens of billions in inflows.
2025: The United States established the Strategic Bitcoin Reserve. The GENIUS Act (stablecoin regulation) was signed into law, advancing comprehensive crypto regulation.
Bitcoin regulation is shifting globally from "ban" to "coexistence through regulation."