Cryptocurrency market is so unpredictable that you just have to be always very careful otherwise missing out big chances will be the humiliating results. However, for those who understand the market, and the fact that it not a controlled market, they always know how to fine tune their decisions to make a call when the first ends up not working out. As much as opportunities abound in trading cryptocurrency, one also has to be smart with it.
Technical analysis still helps, but you have to believe that it is not all the time, as even in Forex or stock, they can still mess up.
Without a doubt, but if you've got the trend to your back, and if that long term trend is a super bull . . .