I know history of price movements in bitcoin is short compared to stocks, gold etc and that history may be a poor indicator of the future for bitcoin but this may be of interest:
We had big, fast price rises in 2011, 2013 and 2017 and then a big fall off each time. Within a 3 month period the price rose respectively from 0.7 to 29, 120 to 991, 4000 to 19000.
It took 19 months for the price to recover to 29
It took 37 months for the price to cover to 991.
If this is a good predictor for our current position then we should expect to be back at 19,000 between July 2019 and Sept 2020.
that is bullish
Based on historical data, bitcoin usually recovers fully into a major bull market in 1-3 years of the end of the last one. If I were asked the question when the next bull market was to come, then I'd say most likely 2020-2021, first of all because I doubt the bear market can last any longer than that, and secondly, the halving has historically been a turning point (even though past performance can't *always* indicate the future). Nobody knows right now how fast or how high the increase is going to be for the next bull market, the ATH could even not be breached, believe it or not.
While this is the case, I don't see 2018 as a bullish year, or even 2019.
Before the recovery happens, the price needs to find strong support at a certain level. Right now I don't think that we have found that support yet.