I do but not always. 
A lot of time actually. It is hard to predict what could happen with bitcoin and a lot more with altcoins. Many have tried to predict but most of the time they fail. I remember one in facebook which is paying if you guess the right price. Out of the many comments it is like 5% are right but it is just a guess without facts provided.
yes i also have the same situation, for some time i do trad on right time and it really give me good profit but some other time it is not so much profitable and it cast a big lost. A lot of time actually. It is hard to predict what could happen with bitcoin and a lot more with altcoins. Many have tried to predict but most of the time they fail. I remember one in facebook which is paying if you guess the right price. Out of the many comments it is like 5% are right but it is just a guess without facts provided.