As we see from the chart above, bitcoin has had many long term bear market. The first bear/neutral market starting from end of 2013 and lasting till mid of 2015. That is a 650+ days of bear market!!! But it was soon followed by slow bull market for next 500 days (about 17 months).
The observation here is solely based on the number of days/months bitcoin stayed in the bear/bull market. It cannot be neglected that bitcoin may once again experience or go through a similar pattern.
As per the previous observations, we may continue to observe a slower price variations in BTCUSD for the next 300+ days or until September of 2019.