Well, it is called prediction for a reason, if they say prediction then it is what there opinion about the price but it doesn't mean it will happen. Mate don't trust all the videos you see because it will only disappoint you, besides, vloggers can earn if they have a lot of viewers or subscribers so they will really make the video title as catchy as people to catch many viewers.
When it says prediction, it doesn't mean that it should always be 100 percent that will going to happen. These prediction should have a basis, such as market analysis and fundamental analysis that might somehow determine what would be the outcome. But if we can see more and more videos and information presenting prediction that are too far to the reality, that shouldn't be considered as market manipulation. We somehow predict because there's a part of it that we wanted people to believe in.
Exactly, there is nothing permanent in the prediction, it is not that accurate although some experts have their basis on their analysis, still it is not guarantee, it's okay to check experts opinions but don't rely on them 100%, it is very important that you are aware of what is happening in crypto world, and not just checking their chart's analysis.