Only invest what you can’t afford to lose…
Discussion
Personally I don’t follow this rule at all. If you have stable income then it’s no need to play it so safe.
Other rules may apply when your income fluctuates a lot or it isn’t so regular.
But otherwise I hold almost no cash, and everything I have I pour into #Bitcoin.
Sometimes I can get a bit nervous, but every situation has a solution. And it is rarely a need to sell Bitcoin.