Chart from 2014, when Bitcoin was $300, predicted price of $10k for today Nov 22nd, 2017.
We're at $8,200. (If we add Bitcoin Cash and Gold prices, we'll get close to $10k).
Next milestone on chart: $100k in summer 2021. And next: $1M in 2027.

In my own opinion, it might happen in the future if every year, the price of bitcoins will be double like it goes up to $50k dollar this year then next year it will multiply again, most of the cryptocurrency analyst is expecting for the price of bitcoins to increase even more in the future.