As an investor, you just let your investments sleep as if you're not going to touch them soon. And while waiting for them to become big, you can have a sideline of trading.
In trading, you're not really that putting much pressure and you can still trade calmly if you can control your mood.
Only investor may stay calm in my experience because traders need to solve lots of hassles so that they could predict the exact movements of markets. So, not taking pressure will not be possible if you are trading but staying calm without any tension will be possible if you remain as a "bitcoin" investor (I mean no other asset may not guarantee you like bitcoin do for its investors).
It's an automated feature that you can use with those exchanges for you to have a peace of mind while you're at sleep. You can hit those orders and even stop your loss while you're away.
You can remain calm as you trade, you don't have to trade and be like the others that you're going to monitor it every single minute.