A massive 3,520 BTC worth over $330 million was lost due to a human mistake, not a hack. The attackers used social engineering tactics, posing as legitimate service reps to gain the victim's trust.

*Key Takeaways:*

- *Social Engineering*: The attackers manipulated the victim through emails, calls, and fake sites, exploiting human psychology rather than technical vulnerabilities.

- *Cold Storage Vulnerability*: Even cold storage, considered a secure method, can be compromised if the user falls victim to social engineering.

- *Importance of Vigilance*: The incident highlights the need for users to remain vigilant and skeptical, especially when dealing with sensitive information.

*Security Lessons:*

- *Never Share Seed Phrases*: Keep seed phrases confidential and secure.

- *Use Multi-Sig*: Consider using multi-signature wallets for added security.

- *Verify Identities*: Always verify the identities of individuals or services requesting sensitive information.

- *Be Cautious of Pressure Tactics*: Be wary of situations where you're pressured to make quick decisions [11].