We need to make the right decision before getting into this situation. When you buy high and sell low you will not gain any from this, you shall hold it first and wait for the right time wherein it will gets high also for you to get what you buy. This is the risk of getting into electronic currencies.
It should be our first priority to hold it for long time, making wise decision can prevent us from lose and best thing in bitcoin is try not to sell at low price., if you will decide at the begging that I will not sell it early you will reduce 80% of risk, after that try to use wallet, and buy more when price seems to you getting low, so these are best steps of bitcoin investment to get profit.