It seems that he is very active and kind of giving frequent signals, but apart from the effective antivirus, is there any particular reason to believe that his views are any better than others? I am just asking, as I have not bothered to research much 
Probably because he has lots of followers, the more follower he has the more people will invest in coins he claims that are going up which will actually cause coins to go up. It is simple as that and I don't see any other reason why he is so great speculator.