Can we hide our secret in islam

Assalamu Alaikum Mufti Sahib, I have a question. I have full knowledge of a halal trading method that I can share with people — and that 90% knowledge is enough to make them profitable. But I also have my own personal trading strategy that is separate from that and not required for success. My question is: Is it a sin if I share the full profitable method with others but keep my own personal strategy private? Or does hiding that personal method count as hiding knowledge in Islam? JazakAllah Khair