Vitalik Buterin, co-founder of Ethereum, has released a new blog post detailing his vision for the ideal crypto wallet. The article focuses on security and privacy, proposing key features such as cross-L2 transaction experience, account security, fraud prevention, data wallet, etc. For cross-L2 transactions, Vitalik proposes to adopt a chain-specific address format (such as [email protected]), and suggests that the wallet automatically handles cross-chain exchange and transfer processes. For account security, he recommends social recovery and multi-signature mechanisms, and a 2-of-3 protection scheme for new users, including zk-email, local key, and service provider backup key. Regarding privacy protection, the article emphasizes the need to integrate functions such as privacy pools and stealth addresses directly into mainstream wallets to achieve default privacy. In terms of data storage, Vitalik recommends that wallets evolve into personal data storage tools, using M-of-N key sharing mechanisms to protect user data. Looking to the future, Vitalik predicts that new technologies such as AI and brain-computer interfaces will revolutionize wallet interaction patterns.