There is no such strategy. However, there are a number of approaches that can help minimize risks and increase the chances of long-term success. An important aspect is managing risks and your emotions. Therefore, the key to success is combining a sound trading strategy with reliable risk management, discipline and psychological stability.
You're right—there's no one-size-fits-all strategy. Successful trading relies on a solid approach, risk management, emotional control, discipline, and maintaining psychological stability for long-term success.