Honestly anyone investing in bitcoin should know this and also separate their money into different category.
Managing to survive in the market volatility is a lot easier when you got money stashed for your emergency situation, so you won't be those kind of people who panic sell and become a paper hand.

This is exactly what I did when there were many dips before the big rally comes in, since I stashed money for emergency fund I can just ignore the dip or buy it even, and then move on.
As a result, I still hold my BTC all the way until now and will still be holding it for years.