You can nitpick that unpredictable fluctuations will impact my calculations. But I’d simply counter with, they would impact your calculations too. The relative percentages would still hold up. So I can’t tell you how much less USD you would make, but I can tell you how much less percent of potential income you would make.
So please instead of trying to pick my calculations apart with arguments that would apply to any calculation, just provide a calculation that shows why your approach is more profitable. The code you linked does not provide that either as it just provides monitoring and not a calculation that compares both approaches. And without that, this discussion is kind of over, because only one side is providing facts and figures. And I’m done arguing with opinion.