"only invest in bitcoin what you are willing to lose"

Hi, I have a question for you guys. why do you always say "only invest in bitcoin what you are willing to lose" We're here to retire in 10 years, if I'm willing to lose a maximum of $ 5k, it won't work. I started with about 7-8k $ 18 months ago, if I now lose the wins it would be a hard blow, but if I would sell every time, I would have a lot less ...

you understand what i mean, you have to endure this pain and the thoughts. you have to stop doubting. I work for a monthly salary, which I gain and lose every day with my portfolio