It is just the same as asking if we can really afford to take a risk and lose money. If the idea raises doubts in our minds, the best thing is not to continue. We don't want to be like those traders, and despite knowing their capabilities, they force themselves to do it.
If we want to succeed, we must also set our minds to trusting ourselves more than we trust the market. We know that trading is not just all about money and capital but also about our thinking. If we believe we can do it, then that is the time we pursue it. Or else, rethink it.
The best and sure way of trade is putting a money that we can recoup easily at risk and when it goes wrong we can get it back easily, if it turns out to be a profitable trading then consider it as a bonus and do compounding.
It's the most less risky way to profit from a trade but people will ignore and went all in because they're not patient enough.
There's no such thing as money we can afford to lose, every money always worth it and have value but capability of recouping money in this case is okay.