Just stop looking at the price of bitcoin. Bitcoin's volatility is one of the reason why it is profitable and also it is the reason why it gives stress when you see the value flactuating or if you missed an opportunity to earn.
Don't put much emotion on the market and just grab all the opportunities to earn. Bitcoin or the whole crypto in general can give you roller coaster of emotion, but I believe it can change your life if you know what you are doing.
With the amount of money that some people invest into Bitcoins, I am not all that surprised when people get all stressed out when the thought of maybe them losing their investments cross their minds. My advice to them is that they shouldn't invest any amount that they are not prepared to lose am sure that will bring their stress levels down.