If you have an idea and knowledge about bitcoin then I am sure under no circumstances will it make you panic.
If you see bitcoin depreciating at night, then what about some people living in other countries. For example, where you live it is already nighttime and where other people live it is already daytime, time zones in countries are different and it is impossible to say that Bitcoin depreciates during the day.
There is no need to panic because bitcoin can always recover and that process is what makes bitcoin much safer to use for trading.
Experienced Bitcoin users are I think can still panic but not often as before or when they are still a newbie. There may be some who don't panic anymore but they can still worry sometimes. For the experienced Bitcoin users, their panic can also be different, like they will only panic buy because the price have been dumping a lot suddenly and then they can panic sell because the price have pumped up unexpectedly. Yeah, some has a different time zone but I think there are times that all of us can see the same price.
Trading is not as easy as you imagine because if trading were that simple there would be many people involved in trading.
In fact trading is much more difficult to carry out and buying bitcoin during the day then in the afternoon bitcoin can go down or up.
As you can see, he still say to watch our Bitcoin's or the market carefully, so he knows that there is nothing easy in here.