if all investors are patient, they're unlikely to fall from such situations and they'll even thank themselves for learning how to be patient.
Being patience and investing are highly related but the basics of investment principles are not limited up to that level. What would happen if you invest with a saturated business or an asset with no future, there being patience got nothing to do with your profits. I mean to say being patience will help only if you are good at choosing right assets. You need to be skilled for where to be patience and where to switch your investments often.
We're not saying that it's limited to it but it is part of the basics for every investor that needs to learn. It's a combination of many important factors that each of us have to learn to become profitable and productive with the investments that we have. And I think if someone invests on a saturated business, they're not experienced at all but still being patient on that part teaches some lessons that before investing, we have to DYOR.
This is what OP didn't mentioned but I am glad that many have mentioned this, patience is a must for every investor.
Investors by nature are impatient and that often leads to first time losses in trading. Eventually the consistent and diligent traders will understand this and stop doing it.
Then there are those people who are rare but have good patience and are able to keep calm throughout events - for them bad times dont matter much and they are able to execute trades efficiently. We should try to be like them and learn from them.
Dont give away money to exchanges just by being in a hurry.
I agree, we should be like those who's got the patience that can't be moved even in the bad times. I think these kind of investors have been tested by time and that's why they seem to be not moving at all and they're calm.