Be wary of the shiny promises of Coinbase's smart wallet system. While passkeys might seem like a novel alternative to traditional seed phrases, they come with their own set of risks. Relying solely on smartphones and other devices for passkey authentication could make users vulnerable to security breaches, especially considering the rise in mobile-related cyber threats.Moreover, the emphasis on public key cryptography might give a false sense of security. No system is foolproof, and hackers are constantly evolving their tactics to exploit vulnerabilities in cryptographic systems.Furthermore, the convenience of immediate wallet creation and direct payments from Coinbase balances may come at the cost of privacy and control. Users could find themselves sacrificing autonomy over their funds and exposing themselves to potential financial risks.Additionally, the support for only 8 networks could limit users' options and leave them stranded if they wish to explore other cryptocurrencies or networks in the future.In conclusion, while Coinbase's smart wallet system may offer some conveniences, users should approach it with caution and be aware of the inherent risks and disadvantages it presents."