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.