I don't really think it's predictable. We can make guesses but there's no guarantee that they will come to life. Yeah there are some factors that affect it but mostly all the predictions like "btc will be 40k buy the end of the year" are not worthy I think.
Yes it is hard to make perfect prediction about the price of bitcoin, no one know how the price of bitcoin will be, I am making good amount of profit using bitcoin so I think future price of bitcoin will be high, we makes prediction using bitcoin market places and price graph, as now a day price of bitcoin is getting better so it means soon market will rise too high, no need to lose your hope just hold and wait.
It is not just hard but impossible. It is impossible to make a perfect prediction to the market or the future value of cryptocurrencies because even though you are a master in reading technical charts in the market you are still have the chance to be wrong so there is no perfect prediction it is just all about speculation.