Every end of year estimate and I see only on this range..

December 2017 - 6000$ - 7000$
               2018 - 12000$ - 13000$
               2019 - 20000$ - 21000$
               2020 - 30000$ - 31000$

So in spanned of five years in my prediction can go beyond $35000 to $40000 per bitcoin in 2021. That is just my self evaluation as i truly trust bitcoin much and its potential to be on that price and every opinion is right.. No exaggeration is intended just truthful believes..