I think it is possible by 2020 because many countries will accept bitcoin as another payment method for purchasing lot of things. By 2020 Bitcoin is going to build large community where it can have more value.
Yeah bitcoin will be more popular by that time and many new companies will start adopting bitcoins and many more people will become aware about it which will take demand to higher level and it will directly contribute in taking price higher and as we know that bitcoin is full of surprises so we may see that price even before 2020.