@cryptologic, the idea is it would help you choose what to focus your trading on–Bitcoin or others.
With Auto Trade as it is today, if you are most bullish on Bitcoin, you have BTC turned on for Auto Trade. But the “Dominance Predictor” could indicate it expects altcoins to rise faster. In that case, you could change your Auto Trade to ETH.
With Auto Trade as it will be in the future, with portfolio management, you may choose to allocate a higher or lower percentage of your trading to Bitcoin vs others based on this mechanism.