So, the title is obvious. Why should you be using this chart. Well unless you want to keep your Bitcoin, pin your ears back.
When BTC dominance is going up and keeps going up it means only one thing. Bitcoin is moving faster than alt-coins meaning your alt holdings are bleeding BTC at a heavy rate.
Too many people think they are winning in this industry because USD is up... When in actual fact they have lost a couple of BTC without noticing.
So take note of the dominance chart. Set an alert within a trend. If it is going down, look at altcoins to trade. If it is going up hold Bitcoin.