I totally agree with your points, people miss them alot, if you are here to make money and trade there is other ways, but if you invest all the money you have and stare at the charts, and invest in the FOMO, there is a big chance you will lose what you invested by doing the wrong moves, think about the long term, or be smart about trading.
I think the three things that we shouldn't do are selling and trading our coins or buying cheaper coins without looking its if that coin have worth. We should wise even more especially in cryptocurrency because before you earn to it, you need to know that its not easy to do, you need to strive more and need your time and effort. So doing the dos and donts will help us to avoid mistakes.