growth in satoschi does not surely mean growth in dollars because if btc drops to $ 100, for example, having so many satoschi does not mean anything, except if it is $ 100 then you must always accumulate dollars and not just satoschi
It means that you should define your purpose for holding or trading. If you mean for the dollars then you should look for dollars but if you mean to accumulate for bitcoin then you should go for satoshi's. But you can simply determine both but it's likely that you will be confused for doing it so determine your basis, either of the two, they're good.