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The Biggest Crypto Hacks Of All Time




Hacking crypto and running away with the bounty is enormously lucrative. That’s why a large number of crypto exchanges have been targeted by cyber criminals. Below is compiled list of the biggest crypto hacks of all times, keep in mind that what listed in this list are the reported hacks as some security breaches were not reported to the public. Update: I added the recent BitPoint hack.

July 12, 2019 The Japanese exchange BitPoint lost $32 million in a hack attack.

June 27, 2019 Bitrue, Singapore-based cryptocurrency exchange Bitrue has been hacked for around $4.2 million in user assets.

May 7, 2019 Binance, World’s largest exchange loses $40 million via a single transaction in a large scale security breach.

April 1, 2019 Bithumb, the South Korean crypto exchange Bithumb was hacked for the third time and lost around $13 million in the EOS and XRP

March 25, 2019 Coinbene lost Over $100 Million in crypto a security breach.

March 24, 2019 DragonEx, had a security breach and lost unknown amount of crypto.

February 15, 2019 Cryptopia, suffered a security breach and lost 19,391 (ETH) tokens worth nearly $2.44 million and around 48 million centrality (CENNZ) tokens worth about $1.18.

September 14, 2018 Zaif the Japanese based cryptocurrency exchange has been hacked, about $60 million worth of cryptocurrency.

July 9, 2018 Bancor was hacked and lost around $23 million of cryptocurrency.

June 19, 2018 Bithumb the South Korean crypto exchange got hacked for the second time and lost around $31 million in cryptocurrency.

June 10, 2018 Coinrail the South Korean crypto exchange lost $40 million in hack attack.

February 8, 2018 BitGrail lost 17 million coins of Nano (XRB) in a hack attack.

January 26, 2018 Coincheck the Japanese exchange lost $500 million in crypto as a result of a security breach.

January 26, 2018 LocalBitcoins lost USD 27,000 in a hack attack.

December 19, 2017 YouBit was breached, unknown amount of crypto was stolen.

June 27, 2017 Bithumb the South Korean crypto exchange got hacked and all of it’s clients data (including their names, mobile phone numbers and email addresses) where stolen.

April 26, 2017 Yapizon the South Korean exchange lost 3831 BTC in a hack attack.

October 13, 2016 Bitcurex Polish bitcoin exchange got hacked and lost $1.5m in crypro. At that time Bitcurex was the biggest bitcoin exchanges serving the European market.

August 2, 2016 Bitfinex lost $72 million in a hack attack.

June 30, 2016 ShapeShift was hacked three times in two weeks and lost around $200K in crypto.

May 9, 2016 Gatecoin lost 185,000 Ether and 250 BTC in a security breach.

May 22, 2015 Bitfinex Hong Kong based crypto exchange lost 1400 in a hack attack.

February 18, 2015 KipCoin lost 3000 BTC in a hack attack.

February 14, 2015 BTER the Chinese based crypto exchange lost lost 7170 BTC in a security breach.

January 4, 2015 Bitstamp lost 19000 BTC in a security breach.

July 29, 2014 Cryptsy lost 13,000 BTC and 300,000 LTC in a security breach.

July 14, 2014 MintPal lost uknown amount of crypto in a hack attack.

March 11, 2014 Crypto Rush lost 950 BTC and 2500 LTC in a security breach

March 4, 2014 Poloniex lost 97 BTC in a hack attack.

March 2, 2014 Flexcoin lost 896 BTC in a security breach.

February 17, 2014 Picostocks lost 5896 BTC in a hack attack.

February 7, 2014 Mt.Gox got hacked for the second time and lost 740,000 BTC (6% of all bitcoin in existence at the time).

October 23, 2013 4100 BTC were stolen.

May 10, 2013 Vircurex lost 1454 BTC 225,263 TRC 23,400 LTC in a single hack attack.

September 3, 2012 Bitfloor lost 24,000 BTC in a hack attack.

July 2012 Bitcoinica got hacked for the third time and lost 40,000 BTC.

May 2012 Bitcoinica got hacked for the second time and lost 38,000 BTC.

March 2012 Bitcoinica got hacked and lost 43,554 BTC.

October 5, 2011 Bitcoin7 exchange was hacked and it’s clients data were stolen.

June 19, 2011 Mt.Gox got hacked and lost $8,750,000 in crypto.

Daily cryptocurrency trader, miner, technology enthusiast and a full time IT and security consultant. If you have any questions or comments please feel free to email him at [email protected]


Around $3.1 Billion Were Stolen from DeFi Protocols in 2022





According to the latest report from Chainalysis, last year was the worst year ever recorded for cryptocurrency hacks. The year 2022 saw the largest ever crypto hacking, with cryptocurrency businesses losing a around $3.8 billion in crypto.

Source: Chainalysis

According to a report, 82% or $3.1 billion of all cryptocurrency theft by hackers in 2022 was attributed to decentralized finance protocols, known as DeFi protocols.

DeFi protocols utilize written codes to regulate the usage of virtual currency on blockchain networks. Smart contracts, a form of digital contracts, play a crucial role in DeFi. These publicly accessible sets of instructions allow for borrowing, lending, and transactions without intermediaries. Transactions occur automatically once the terms and conditions outlined in the smart contract are met.

Source: Chainalysis

DeFi is a rapidly growing and attractive aspect of the cryptocurrency space, primarily due to its transparency. Transactions in DeFi occur on the blockchain and the governing smart contract code is publicly visible, allowing users to fully understand what will happen to their funds. This transparency is particularly appealing in 2023 after many centralized cryptocurrency businesses faced issues due to a lack of transparency in their actions and risk profiles. However, this same transparency also leaves DeFi vulnerable as hackers can scan for vulnerabilities in the code and exploit them for theft.

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What is a 51% Attack on the Blockchain?





A 51% attack is a type of attack against blockchain that occurs when a miner (a single attacker) or group of miners gain control of more than 50% of the network’s total mining/hashing power, allowing them to manipulate the blockchain and double-spend coins. This type of attack is particularly dangerous because it allows the attacker to reverse transactions and prevent new transactions from being confirmed.

Ethereum Classic blockchain

One of the major incidents of a 51% attack occurred in January 2019 on the Ethereum Classic blockchain. An unknown attacker was able to control more than 50% of the network’s mining power and used it to double-spend coins, reversing transactions and stealing more than $1 million worth of cryptocurrency.

Additionally, in August 2021, the Ethereum Classic blockchain was hit by another 51% attack incident where the attacker used their control over the network to double spend $5.6 million worth of cryptocurrency.

Bitcoin Gold blockchain

Bitcoin Gold, a cryptocurrency that forked from the original Bitcoin blockchain in 2017, experienced a 51% attack. This resulted in the double-spending of over $72,000 worth of Bitcoin Gold tokens. This was the second time that Bitcoin Gold has suffered such an attack, with $18 million worth of tokens being stolen in May 2018.

Bitcoin SV blockchain

In the case of Bitcoin SV (BSV), there have been several instances of 51% attacks reported in August 2021.

by Lucas Nuzzi, a network data product manager at Coin Metrics

But according to the Bitcoin Association, the hacker’s attempts to perform a 51% attack were not successful.

Other major incidents

In addition to these incidents, there have been several other instances of 51% attacks on other smaller blockchain networks such as ZenCash, Monacoin, and Verge. For example, in April 2018, the ZenCash blockchain fell victim to a 51% attack, resulting in the attacker stealing more than $500,000 worth of cryptocurrency. Similarly, in May 2018, the Monacoin blockchain was targeted in a 51% attack, resulting in the attacker stealing more than $90,000 worth of cryptocurrency.

How to fight 51% attacks

These attacks also highlights the importance of implementing security measures such as checkpointing, which allows the network to periodically take a snapshot of the blockchain and use it as a reference point to detect and prevent any malicious activity.

Another way of mitigating such type of attack is to use a different consensus mechanism which is more resistant to 51% attack like Proof of Stake (PoS) which do not rely on hashing power to secure the network.


The 51% attack is a serious threat to the security of blockchain networks, particularly smaller networks. It is crucial for blockchain networks to take steps to prevent such attacks and for users to be aware of the risks associated with small and under-secured blockchain networks.

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Bitcoin Hacks, Fraud and Scams: How to Protect Yourself?





Bitcoin Hacks, Fraud and Scams: How to Protect Yourself?

Bitcoin, the world’s first and most widely recognized cryptocurrency, has revolutionized the way we think about and use money. It has also, unfortunately, opened the door to a new type of crime: Bitcoin hacking, fraud and scams.

If you own bitcoin, or are thinking about buying some, it’s important to be aware of the various scams and frauds that can target you. Here are some tips to help you protect yourself:

Don’t fall for phishing attacks:

Scammers will often send fake emails or texts claiming to be from a legitimate bitcoin exchange or wallet service, asking you to click on a link and enter your login details. Don’t fall for it! If you receive an unsolicited message that seems suspicious, do not click on any links or enter your login information. Instead, go directly to the website of the exchange or wallet service in question and log in from there.

Use a reputable exchange:

If you’re buying bitcoin, be sure to use a reputable exchange. Look for an exchange that has a good reputation, a long track record, and a user-friendly interface. Avoid any exchange that seems shady or unprofessional.

Avoid Telegram scams:

Unfortunately, Telegram is full of fake initial coin offering, scam projects, Ponzi schemes, fake subscriptions to paid dump & dump groups ..etc. it is important to be cautious when interacting with unknown individuals or groups on the platform. Do not click on links or enter your personal information unless you are certain that the request is legitimate.

Be aware of exit scams:

Do not store your cryptocurrency in online crypto exchanges. Online Exchanges are not safe for storing cryptocurrencies. If you keep your private keys in a safe place, your coins can’t be stolen when an exchange is compromised. We have covered some exit scams before like: ADAX, Claymore and NovaChain. And always remember, Not Your Keys, Not Your Coins. It’s that simple.

Use a hardware wallet:

A hardware wallet is a special type of device that stores your bitcoin offline, making it much harder for hackers to steal your funds. If you own a significant amount of bitcoin, it’s a good idea to invest in a hardware wallet to keep your funds safe.

Don’t share your private keys:

Your private keys are like the passwords to your bitcoin and your cryptocurrency wallets. Keep them secret and secure, and never share them with anyone.

Be cautious of “free” bitcoin offers: If something seems too good to be true, it probably is. Be wary of any offer that claims to give you free bitcoin. These types of offers are often scams designed to steal your personal information or trick you into investing in a fake cryptocurrency.

Don’t fall for Bitcoin investment schemes:

These scams involve individuals being duped into investing in fake or fraudulent investment opportunities, resulting in the loss of their money. Always be cautious of “too good to be true” offers.

Avoid Rug pull scams:

Rug pull scams are a type of cryptocurrency scam in which a group creates a fake cryptocurrency and promotes it as a promising investment opportunity. The group will often use social media, Telegram, or other online platforms to promote the coin and get people to invest in it. Once the group has raised a significant amount of money, they will “pull the rug” out from under the investment by disappearing and leaving the investors with worthless coins. This type of scam is called a rug pull because it is similar to the action of pulling a rug out from under someone, causing them to fall. Rug pull scams are particularly insidious because they can be difficult to detect, and people who fall victim to them may lose significant amounts of money. It is important to be cautious when considering investments in cryptocurrencies and to thoroughly research any coin or project before investing.

Enable two-factor authentication:

Two-factor authentication (2FA) is an extra layer of security that requires you to enter a code sent to your phone or email in addition to your password when logging into your account. This helps to prevent unauthorized access to your account even if someone else gets hold of your password.

Use strong and unique passwords:

Make sure to use strong, unique passwords for all of your accounts, and avoid using the same password for multiple accounts. It would be a good idea to use a password manager that can help you generate and store strong, unique passwords for all of your accounts.

Enable transaction notifications:

Some exchanges and wallets offer the option to receive notifications for all transactions. This can help you stay on top of your account activity and be aware of any unauthorized transactions.

Use a reputable antivirus software:

Installing antivirus software can help protect your computer from viruses and other malware that could compromise your bitcoin wallet or steal your personal information.

Enable account recovery options:

Many exchanges and wallets offer account recovery options, such as the ability to reset your password or access your account through a secondary email address. Enabling these options can help you regain access to your account in the event that you lose your login credentials.

Use a multi-sig wallet:

A multi-sig wallet requires multiple signatures, or approvals, before a transaction can be made. This can help protect your bitcoin from being stolen in the event that one of your signatures is compromised.

And finally, use a virtual private network (VPN):

A VPN can help protect your online activity and keep your connection secure when using the internet. This can be especially important when accessing your bitcoin wallet or making transactions.

    By following these tips, you can protect yourself from bitcoin fraud and scams. Remember to always be vigilant, and never share your personal information or login details with anyone.

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