The world of cryptocurrency is exciting, but it also attracts scammers eager to take advantage of unsuspecting investors. As a result, some scams have gained notorious reputations, causing severe financial losses for many. In this article, we will explore the top 10 biggest scams in the crypto space, examining how they operated and the impact they had on the industry.
10. Mt. Gox Hack (2014)
Once the largest Bitcoin exchange globally, Mt. Gox handled over 70% of all Bitcoin transactions. However, in 2014, it declared bankruptcy after revealing a massive hack. Approximately 850,000 bitcoins, worth around $450 million at that time, were stolen.
The fallout from the Mt. Gox hack prompted significant changes in how cryptocurrency exchanges secure user funds. In response, global regulations and security protocols tightened, aiming to protect investors from similar incidents. Even now, efforts continue to recover the lost funds, leading to ongoing legal battles and compensation plans.
For many, this was the start of the 2014 bear market.
9. Thodex (2021)
Thodex, a Turkish cryptocurrency exchange, became infamous when its founder, Faruk Fatih Özer, vanished in 2021. He allegedly took with him around $2 billion of investors’ funds. Just before disappearing, Thodex halted all trading, withdrawals, and deposits, leaving around 391,000 active users without access to their assets.
This sudden closure resulted in panic and outrage among users, many of whom had invested substantial amounts of money. Turkish authorities swiftly launched an investigation, issuing an international arrest warrant for Özer.
8. OneCoin (2017)
Founded in 2014 by Ruja Ignatova, OneCoin was marketed as a revolutionary digital currency. Investors were promised high returns and a robust educational platform. However, it soon became clear that OneCoin lacked any real blockchain technology, functioning primarily as a multilevel marketing scheme.
Investors were encouraged to purchase educational packages and recruit others. OneCoin attracted billions from investors worldwide before authorities took action. By 2017, several countries were investigating OneCoin, leading to arrests of key figures. Ruja Ignatova vanished, becoming one of Europe’s most wanted fugitives.
7. QuadrigaCX (2019)
QuadrigaCX, Canada’s largest cryptocurrency exchange, became embroiled in scandal following the reported death of its founder, Gerald Cotten, in December 2018. Cotten was believed to be the only person with access to the exchange’s cold wallets, which held around $190 million in cryptocurrencies. This situation led to a liquidity crisis, preventing users from withdrawing their funds.
As investigations unfolded, it became apparent that the cold wallets had likely been empty for months before Cotten’s death. This revelation sparked outrage and confusion among users.
6. DAO Hack (2016)
The Decentralized Autonomous Organization (DAO) was an innovative project on the Ethereum blockchain designed as a venture capital fund without central leadership. Launched in April 2016, it quickly raised over $150 million in Ethereum (ETH) due to its unique funding model.
However, in June 2016, an unknown attacker exploited a vulnerability in the DAO’s smart contract code. They drained approximately 3.6 million ETH, valued at around $50 million at the time. To address the crisis, a hard fork of the Ethereum blockchain was implemented, rolling back transactions to return funds to their original holders. This decision resulted in a split, creating Ethereum (ETH) and Ethereum Classic (ETC).
5. PlusToken (2019)
Emerging in 2018, PlusToken became one of the largest Ponzi schemes in the cryptocurrency world. The platform presented itself as a crypto wallet, offering high-yield returns for deposited cryptocurrencies like Bitcoin, Ethereum, and EOS. Investors were led to believe that profits would be generated through trading and referral benefits.
PlusToken attracted millions of users and reportedly amassed around $2 billion in various cryptocurrencies. However, as withdrawal requests surged, skepticism grew. By mid-2019, several key operators were arrested during an international police operation.
4. Ronin Network Hack (2022)
In March 2022, the Ronin Network, an Ethereum sidechain created for the game Axie Infinity, suffered a devastating hack. Attackers exploited security weaknesses to steal approximately $625 million in Ethereum and USDC.
Following the incident, the Ronin Network implemented security measures and planned to reimburse affected users. The hack highlighted the vulnerabilities in DeFi projects and emphasized the need for improved security protocols.
3. Mirror Trading International (2020)
Mirror Trading International (MTI) claimed to offer massive returns through automated crypto and forex trading. Founded in 2018, MTI attracted investors by promoting advanced AI-driven strategies. Unfortunately, it turned out to be a classic Ponzi scheme, using new investments to pay earlier participants.
By 2020, when withdrawals overwhelmed new inflows, MTI collapsed. The CEO disappeared, prompting global regulatory intervention. Almost 280,000 individuals were affected, showcasing the risks associated with unregulated investment platforms.
2. Wormhole Hack (2022)
Wormhole is a bridge connecting various blockchains and suffered a significant security breach in February 2022. Hackers exploited a vulnerability to mint 120,000 fake Wormhole Ethereum tokens, equivalent to around $325 million.
The incident triggered immediate action from Wormhole developers, who offered a $10 million bounty for the recovery of the funds and a fix to the vulnerability. Through negotiations, a significant portion of the stolen assets was recovered, highlighting the importance of security in cross-chain operations.
1. BitConnect (2018)
BitConnect launched in 2016 and quickly gained traction by promising astonishing returns through its investment platform. It operated like a classic Ponzi scheme, enticing investors to lend Bitcoin in exchange for BitConnect Coins (BCC). Daily profits were promised, which raised red flags among experts.
By late 2017, BitConnect’s market cap exceeded $2.5 billion, but the scheme collapsed in January 2018. U.S. regulators issued cease-and-desist orders, resulting in a crash in BCC’s value. Many investors faced massive losses, highlighting the risks of such investment platforms.
At least this scam produced us the famous meme that is still used today.
Final Thoughts
Today scams are often in the form of rug pulls in meme coins. The developer starts a coin, and within a day he dumps on the investors and is gone with the wind. They often run off with 5 or 6 figures in profits. It’s not as elaborate as the scams mentioned in this list, but it is currently happening hundreds of times per day!
The world of cryptocurrency can be thrilling, but it is crucial to remain vigilant. The scams mentioned above serve as stark reminders of the potential dangers in the crypto space. As regulations evolve and security measures improve, investors must educate themselves about risks. By staying informed, individuals can better protect their investments and contribute to a safer crypto environment.
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