I am not an expert in crypto trading, but the little experience I have is that, in week days coin normally go up so the profit is higher than in weekends. Sometimes in weekends that's when people have enough time to trade, at that particular time some people will be selling, as a result of that the price fall and the profit become less.
It may be your calculation is good about rise or price but generally on weekdays this going down as well because volume goes down just because of this not good activity just panic sellers or peoples with nothing serious in trading having something.
Traders with good funds and having good work all weekdays mostly have off day because It's also very important for them to have some other activity or done some off field activities which help them for having fresh mind and better results doing trading all days without off having very bad impact on many which bring big loses or many other issues with health as well.