Upgrading the movement in an existing watch is indeed possible, but it's a decision that requires careful consideration. The feasibility of such an upgrade depends on several factors, including the watch's design, case dimensions, and compatibility with the new movement. Additionally, this process demands technical expertise and specialized tools to ensure a seamless transition. While upgrading the movement can potentially enhance the watch's performance and functionality, it's important to consult with experienced watchmakers or technicians to assess whether the upgrade is viable and cost-effective.