It seems to me that today there is no need to consider the question of whether to leave or remain in trade. If you have already decided to trade once, then you need to continue to work, especially to gain experience and learn more information. Bad times are always on the cryptocurrency market, but the results depend only on our work.
OP have a problem is not that time is bad. Over the last 2 years we have seen different markets. And the one who understood what he was doing in 2017 became a very rich person. If from the moment of posting (January 2019) to return 2 years ago, then it turns out that he started trading in January 2017. 2017 was a golden time and if the trader could not earn even at such ideal time, then the problem should be looked much deeper.