That's the way they make money, and you know it's a trend on Youtube to get lots of views, subscriptions and comments. I think they fooled you, Why don't you make your own crypto currency study? I'm sure they won't fool you and you'll know if what they're saying is true.

And, don't include it all, there are really lessons to learn such as why and what bitcoin is, What and why bitcoin has fallen and so much more. Not all videos are just for the money and this is what you should appreciate.