Answers for the Quest  "Crypto Mixers and Cross-Chain Bridges" in Certik (https://skynet.certik.com/quest/crypto-mixers-and-cross-chain-bridges?referralId=628218145926182179)

1. What is the primary function of a crypto mixer?
- To obfuscate the origin of cryptocurrency transactions

2. How do cross-chain bridges facilitate money laundering?
- By enabling the transfer of assets between different blockchains, making tracking more difficult

3. Which hacking group has been linked to laundering stolen cryptocurrency through mixers like Blender.io?
- Lazarus Group

4. Which strategy is NOT effective in combating the misuse of crypto mixers and cross-chain bridges?
- Increasing transaction fees for all users