As a beginner, starting an investment with a smaller amount of money that he can afford to lose is the best option.
No I totally disagree with you that only for beginners is "Invest what you can afford" That only for beginners to be used "invest as much as you can afford". In fact, this is not the case. Invest what you can afford is for every person, whether he is a beginner or an expert, because everyone can lose. Bitcoin has a volatile nature and it can make everyone lose. If everyone invests all their money in Bitcoin and it gets dumped, it may become difficult for him tomorrow because he will need money and the money will have been invested in Bitcoin and he will not get anything until he eats, so it is likely that he should invest so much. As much as you can afford.
I'm sure a lot of people will disagree with me, but the only people's who will voice their disagreements are those who didn't comprehend my point clearly. The primary reason I brought up biginners is that they are the ones who have just newly interested in investing and they're lack of full knowledge about how to enter and exit the market. For this reason, I suggested that investors should exercise caution when deciding how much money to start with. It is a good idea for everyone to invest the maximum amount of money they are willing to lose.
However, individuals who possess expertise in investment do not need to address them in the same manner that we can address the biginners that start investing newly. Because they have extensive investment knowledge and expertise, they understand how to watch market strategies and avoid them losses.