User story: Feature request: 在用戶 copy private key 時,可以有警告訊息提示「未管理好 private key 可能導致失去帳號」,或是像 Metamask 一樣有 protection 機制 Supporting materials: N/A ┆Issue is synchronized with this [Asana task](https://app.asana.com/0/1201016280880500/1201407285519881) by [Unito](https://www.unito.io) ┆Created By: Yi-Min Lin