We have different techniques and strategies on how to manage our investment though you have some good points also as not all good sentiments will help you.
You cannot just rely to the mere sentiments that were made to those people either they are professional or not. We cannot deny also that there are manipulation in bitcoin price so it is very important that we really know what we are doing by digging some good information and also to stop relying to others.
Most of newbie just rely on what experts say and that why they cannot survive in the market when they make an investment. Bitcoin is not something that you make sentiments on it. Make a research and invest smart then you can survived in this current market.
There are no so called experts here. All of them are just making wild educated guesses like you on me.
But a good advise to newbie is to really do your own research (DYOR). You can't just rely on someone else opinion and just make a decision on that.
When I was just a beginner, I just read all the news I can find in crypto related websites, but I soon realized that they are just garbage and almost articles are released without any validation from the source.