Honestly, managing your trades everyday is really difficult, even for professional traders because minimizing losses gives pressure to others, especially if we are in the middle of the bear market that you are not able to buy low, sell high if the market is really down. I think the best way to manage your trades is you should know first how to control your emotions when the market is down for you not to panic sell and for you to become patient with all of your holdings.
If you are an experienced trader then you will not have a hard time in managing your trades per day. Minimizing losses is also normal for an experienced traders because they know how to set up their trading strategy and execute it in the market. Experienced traders have enough knowledge and experience to ease things up and that is what you should be really focusing on if you want to manage your trades very well.
Most of the traders strategy is that they are adding some of it to their capital for them to maximize it and some they will cash out and they will save it, I myself also doing this as I don't want to take risk everything so I am saving some of it so that I can have something to get when I needed fund, we should not gamble everything, our main goal should be to save our profit.
Well, in my opinion, the way you are the most correct, do not use all capital for trading, assuming to anticipate if things are not desired or market conditions are not favorable. although a pro trader, I'm sure there will be moments when they feel bored seeing unfavorable conditions and then prefer to take a break and enjoy the money from trading profits (save or cashout into fiat). Or when you get stuck taking the wrong position, and want to recover, the saved money can be a savior (buy again at a low price).
To be sure, the purpose of trading is to make a profit, as soon as possible make a withdrawal into money (fiat) if you already get a pretty good profit.