There is always room for improvement. However, not everyone believes that. But in order to continue to succeed, in order to continue to lead, in order to continue to contribute to the effectiveness of the organization, the leader must continue to invest in themselves. This is not the time to rest. Yes, you have worked hard to reach this place in life. But it is not a destination.
The biggest issue with leaders reaching the pinnacle of their career is the thought that they have arrived. Instead, you must work hard every day to continue to grow. There is always something else to learn. Always be willing to invest time every day to self-improvement, no matter where you are in your career. Read a good book, watch a good podcast, attend seminars. However you best learn, invest the time. Because when you stop learning, your career is done.