if you expect the price of bitcoin to rise to $ 20k, that might happen, it's just that we have to look at the data now, the price of bitcoin is now $ 6.305. My estimate if it does experience an increase might increase in the range of $ 7k - $ 15k in the last quarter in 2018
Bitcoin does not follow any rule of price increase, the price may increase $ 20k or $ 30k in a few weeks when the market has a good rebound. However your guess I feel more accurate.