I think bitcoin can reach $ 20000 by the end of this year, we can see today bitcoin prices make us all surprised with very high rise, yesterday I woke up and saw bitcoin price $ 12000 and today I see bitcoin price has reached $ 15000 what the hell with this price.
20K before the end of the year seems pretty fast to me.
But we also reached 10k quite "easily" this year.
now the current price of bitcoin is $13000 and the price of bitcoin is countinously increasing because the demand of bitcoin is increasing by the people so by seeing the demand and countinously increasing price of bitcoin it estimate that the price of bitcoin will hit $20000 at the end of january of 2018. But it is not sure that the price of bitcoin will hit at the end January it depend on the market value of bitcoin.