By 2020 I expect as well predict the price will be sitting closer to $5000 or above $5000. The reason is that by 2018 a good price increase is expected as more and more Countries have been coming into digital currency development. Along with this by 2020 a halving takes place so sure a next price increase is assured. So the price reaching $5000 has got increased chance.
Among all this we will see the next bitcoin halving on the same year. Normally in the halving time price use to double in the chart and till continuous price pump hitting on the chart till the 2020. That time itself price will turned to 5000$. Later on that bitcoin value bump again and it will touch to 8000$ to 10000$ end of the 2020.