Prediction is the core of bitcoin market. Without prediction, entire market is bound to fail. We invest in bitcoins because we believe that the value of bitcoin will be high in future. That's one kind of prediction.
Also majority of the crypto trades are based on short term predictions. If people stop predicting/speculating bitcoin's price, the market movement will be halted and the growth will be stopped. Bitcoin is largely a speculative asset. Without prediction, nothing will be achieved.
Prediction without basis is really not a good thing to believe with, but as we all know the cryptocurrency runs with predicted outcomes that might occur in the near future, we do not need to trust prediction which is kerely opinionated. We hould firmly believe to the ideas given by the experts who gathered information, conducted research and such in able for them to prove the things they are saying. It is not bad to believe but lets believe to the facts.