How much margin should I keep?

As an investor in the cryptocurrency and finance market, I'm always looking for ways to maximize my profits while minimizing my risks. So, the question that often comes to mind is, how much margin should I keep in my trading portfolio? Is there a specific percentage or a rule of thumb that I should follow? Understanding the right amount of margin can help me better manage my trades and protect my investments in this volatile market. Can you provide some guidance on how to determine the optimal level of margin for my trading strategy?