Many people are comparing the recent btc pump to 2013 pump, when it also went like crazy, then pulled back to much higher prices than the bottom, accumulated for a while, and then continued its forward movement towards new heights. That's a likely scenario for 2019-2020, but it will take a longer time as the market is much bigger than 6 years ago. I would not recommend to sell now if you're aiming at the span of 2-5 years.