Looking at the daily PnL sounds annoying. You would probably go crazy and I think it's better to look further out. Maybe over the past year or few months. It's easier to have a better sentiment of the market then. However, it's probably best to never look at it unless alerts happen and it's time to buy or sell.
For sure - as they say, zoom out. The other thing with the daily PnL on exchanges is, the balance of tokens is always changing, making it useless.