Security researcher Kain argues that an iPhone purchased directly from an official Apple Store serves as the best hardware wallet for cryptocurrency storage. His reasoning centers on supply chain security: iPhones are produced in such massive volumes that they become impractical targets for tampering during manufacturing or distribution. Fellow security experts tayvano_ and Austin Griffith endorsed the perspective while adding critical caveats. They emphasized pairing the device with multisignature setups and robust backup strategies to mitigate risks associated with single-device custody. The discussion highlights growing consensus among crypto security professionals that mainstream consumer devices, when properly configured, can rival dedicated hardware wallets in protection against sophisticated attacks.