It makes no sense to watch bloggers, they get paid for it and somehow make predictions, I personally follow everything every day.
Of course, you can not blindly listen to other people's advice. Most bloggers are not sincere about what they say. They get paid for it. Therefore, to look for promising projects and make a decision in what you need to invest only yourself relying on your own knowledge, experience and luck!
You always need to build on your own experience, this is the best thing to do than to listen to those people who have money on it, I mean advertising on YouTube itself