I believe that we should never trust 100% in any prediction about it, even if that person is presented as the greatest expert or master on the subject, because we must always keep in mind that at the beginning of 2017, when the price of bitcoin was just in $1,000, none of those alleged "gurus" was able to predict that the price of bitcoin would reach $20k some months later. And besides, neither was able to predict the tremendous collapse that the market would suffer next.
If those relevant historical events went completely unnoticed by the "experts", I think none of them has real bases to present themselves these days announcing that bitcoin will reach this or that price by the end of the year.
Well since there are many experts around the world there are different variations when it comes to their speculations and when it comes to believing i am not 100% would believe on them because we all know that whatever they it is still speculations. Expert or non expert may have their speculations and there are some speculations that comes from non experts but can actually be true. So in short i do not believe on experts speculations.