The future of bitcoin is not pridectable completly a mistry because honestly it is the first time of something like bitcoin exist and as we know all the good thinks have some bad side too so its hard to guess what will come in the near future from it
well it is kinda possible to predict the bitcoin price right now in my opinion and it will remain like that in the future, right now i can see that it should grow
If you say future of bitcoin is not predictable because that reason, besides of that the future of bitcoin and what bitcoin can be is can be make by the user of bitcoin it self. Depends how the user treat bitcoin to make good future bitcoin.