In my own personal opinion, there is a huge chance that bitcoin could go to the moon again or reach it's price up to $20,000 again just like in the year of 2017, but for now i think bitcoin will not reach it's price up to $20,000 before the end of this year of 2019 because bitcoin is still recovering it's price due to it's downturn. I think bitcoin could go to the moon maybe in the year of 2021 because there are predictions that bitcoin halving will happen in the starting year of 2021.