bitcoin is a prodigy, but in tough times in its short life, there are periods where bear markets create tough circumstances. It is best to review how these work
1) always run bollinger bands with long time frames, ie 200 and 100 day SMA 2) contrast that long period with the 50 MA and a 34 or similar EMA 3) buy low bollinger bands, after several frames (days/hours) of proof of low (hard but doable over longer time frames)
Even in absolute nightmare bear markets, such as above, the trader yields above 100% gains.