As I see, the majority of traders loose because of poor risk management. IF you cannot manage risks you cannot earn in long-term, that's it. My personal recommendation is either to learn risk management. or use the software that will do risk management for you. Personally I use Bitinsure service to monitor all the risks and stats at several accounts.
Ive also lose a lot because of my poor management and because I did not sell my coin when it is the right time, I become greedy , I want more so I wait even more, then now it is my biggest regret of all time the coin that I am holding is now become one of the shitcoin in the market, and I am vey upset because of it, I wish that time I sell it so that I have a 1btc right now.