Few days ago I decided to utilize some fraction of bitcoin just sitting in my trading wallet to try profiting from the market. Although I may profit when the profits was calculated in dollars but unknowingly I lost massively in Satoshi value. That means assuming I just kept hold of my coins I would had made almost the same value I made with the coins i bought. Many traders haven't realized this yet but just get carried away with the US value of their trades without realizing they lost some satosh in the process. When training, what are you mostly concerned about, to gain more profit in bitcoin or gain more in usd dollar without minding if you lost some Satoshi value?.
The case you mentioned above is important but you can actually only have profits in terms of the United States dollar only if the price for bitcoin rises up. In this situation, even if you loss few satoshis it won't matter but you would have profits in terms of dollars so it would not be an effective loss. If we are not considering the prices in the US dollar than we will specifically have profits in terms of satoshi and we would start earning a fixed profit in terms of bitcoins only.
For example, if we bought 0.5 BTC and the price hikes up by 2% than you would instantly gain 0.01 BTC profit which would entirely be in terms of bitcoin only. This way, you could boost multiplying the fixed number of bitcoins you have by constantly trading with those instead of selling those for USD and buying back.