Should I only promote clickbank products and become expert in clickbank , or should I get into making money online niche and become expert in money making online niche , or should I become an expert in affiliate marketing , or should I become an expert in adsense , or should I become an expert in cpa marketing , or should I become an expert in article marketing or should I become an expert in email marketing or should I become an expert in adwords marketing.I'm no where right now , and I need to choose a way , My question is what is an expert and how to be an expert and what do I become an expert in and what are things I can become an expert in ? I would be really greatful to you for taking time to answer my question.