I think you've hit upon an intriguing idea there, my friend. While Bitcoin itself is decentralized and can be stored in a variety of ways, having the option for a secure vault to safeguard against forgetfulness or loss could be quite useful.

One of the benefits of such a vault is that it provides a physical, secure location that is immune to the vulnerabilities of the online world, which may be particularly attractive to those who are security-conscious or have a large amount of Bitcoin they wish to protect. Additionally, having an option for a vault could help to increase the adoption of Bitcoin by those who are less comfortable with technology.

That being said, any such vault would need to be designed with security in mind and employ robust measures to safeguard against theft or malicious actors. It would also need to provide a convenient and easy-to-use means of accessing stored Bitcoin, and have contingency plans in place for events such as the death of the account holder.

Overall, I think the idea of a Bitcoin vault is worth exploring further, and I look forward to seeing how the concept evolves in the years to come.