You just need to pretend that you are confident in everything you say, and then people will believe you.
Yes, and that is not difficult to do, the bad thing about this is that they deceive people and make them believe that they are going to win, when to be a professional in this you have to deal with the truth, it is much better to make groups where everyone contributes and says their opinions and choose the best result to bet on, but that is something very difficult, the guru or owner of the group would have to present his signals and that those signals be analyzed by everyone in the group and that they reach a consensus, but they would not have to charge or anything, then the business ends.
Many of these influencers who give advice and provide trading signals are afraid that there are people who have lost on their advice. And that these people will beat them up on the street. Therefore, often such influencers and "experts" do not live in their home country or even in a neighboring one, but somewhere far away, often in the USA or Dubai.
And only occasionally do they go to attend conferences and take new photos. All this is necessary to pretend that they are important and cool.