We know that the market is dynamic,as in it changes constantly,and as such,an investor who isn't careful enough to know when he is investing will fall in to heart problems or emotional trauma as a result of a massive fall in value,that is why it is important to condition your mind in a way that you won't get heart failure when you are at the loosing end.
Every investor knows there is risk in the game,and taking the risk is what shows you are ready to eradicate poverty from your life.
It is true that investment and trading of Bitcoin requires high degree of patience/emotional control, because it is very painful to see your capital loss to the extent of 90% but for experienced traders it is normal behavior of crypto market. Extreme volatility in a way is beauty of crypto market because it give earning opportunities to traders every now and then to take entry and exit whenever opportunity arises.