The best approach to trading Bitcoin in my opinion is not to, the best approach is to accumulate and hold or the way is commonly referred HODL here is why I say this, Bitcoin is currently extremely volatile unless you are a pro trader at least in my case is hard to be able to make money this way in my case the couple of times I had tried to time the market instead of dropping Bitcoin continued to climb after an small drop so I wound up buying at a higher cost due to fear of missing out or FOMO.
Based on this all I do now days is to DCA or Dollar cost averaging every week I have set up to purchase X dollar amount of bitcoin at the same time on the same of the week and I honestly do not pay attention to the price on a day to day basis I consider my self to be in for the long term.