Yes, you have answered people's questions, but that does not mean 100% that you are a doctor. You could be a nurse, physicians assistant, student, or maybe even just have memorized Grey's Anatomy (not quite serious on that last one).
Whenever I am going to see a Dr, I look up their history and use a service to verify that they received their degree where they say they did, did their residency where they say they did, have had no malpractice suits against them, etc.-and that is among people I know for certain are licensed physicians.
I really don't mean to discredit you if you are in-fact a doctor, but I am amazed that no one has even thought to verify your credentials. A few posts above me I see another guy saying he is an Orthopedic Surgeon. Well, I am a Trauma Surgeon. See what I mean-I can be ANYTHING I want online. Before I take your advice (and I suggest before anyone else does, too) I would have to see verification that you are in-fact a licensed doctor. Don't call it "trolling", call it due-diligence, which, when it comes to health, really shouldn't have any boundaries.
Not only am I an orthopaedic surgeon, I am also a dealer in shiny novelty physical bitcoins that you recently bought from me but you do bring a good point. If people are to pay for consultation, than credentials and liability are at issue. The credentials part doesn't bother me - easy enough to look me up - the liability issue however is bothersome, which is why I would prefer to offer free medical advice with disclaimer