There have been several incidents in the crypto world over the years that have had significant impacts on the industry. Some of the most notable incidents include:

1. Mt. Gox Hack: In 2014, Mt. Gox, one of the largest cryptocurrency exchanges at the time, was hacked, resulting in the loss of 850,000 bitcoins, valued at around $450 million at the time. The incident highlighted the need for better security measures in the cryptocurrency industry.
2. DAO Hack: In 2016, a smart contract on the Ethereum blockchain known as The DAO was hacked, resulting in the loss of over $50 million worth of ether. The incident led to a hard fork of the Ethereum blockchain, which resulted in the creation of Ethereum and Ethereum Classic.
3. Bitfinex Hack: In 2016, Bitfinex, a Hong Kong-based cryptocurrency exchange, was hacked, resulting in the loss of 120,000 bitcoins, valued at around $72 million at the time. The incident highlighted the need for better security measures and risk management in the cryptocurrency industry.
4. QuadrigaCX Scandal: In 2019, QuadrigaCX, a Canadian cryptocurrency exchange, filed for bankruptcy after its founder and CEO, Gerald Cotten, died unexpectedly. The exchange held around $190 million worth of cryptocurrency belonging to its customers, but the funds were lost due to Cotten’s sole control over the exchange’s cold wallets.
5. DeFi Exploits: In recent years, decentralized finance (DeFi) protocols have become a popular target for hackers due to their potential vulnerabilities. There have been several high-profile DeFi exploits, including the $600 million Poly Network hack in 2021.

In conclusion, the cryptocurrency industry has seen its fair share of incidents over the years, highlighting the need for better security measures and risk management. As the industry continues to grow and evolve, it is important for companies and users to remain vigilant and take steps to protect themselves against potential threats.