Yeah that is achievable by that time as we will see more users and more shops accepting bitcoin by the year 2020 and majority of people will be aware about it.
Bitcoin price won't increase just because many merchants will open their payment method in bitcoin. It's just another option for customers on how they will pay their goods.
If you want to earn big it's a good time to buy some bitcoins and hold them for 4-5 years.
Then in 2020 look back an sell them.