I have advised him. He likes using stop loss and other things that he can use not to lose, but he still lost money anyway until he lost all the money.
When he wanted to borrow, the did not tell me, I would have advised him not to borrow the money.
Bro, in one of your own topics, you said people can be gamblers in trading, or maybe I am confusing your topics with someone else's. But yep, it is true. I can be addicted to trading and can lose everything without managing my risk. If that friend of yours is earning $1k a month from his business, then he is taking a lot more risk than he was supposed to take. He should not have taken that loan in the first place. Even if he did, he should have managed the risk.
Well, if he wants to learn more, then that's not a sign that he is addicted. If he has done it for the first time and he is determined to learn so that he won't make the same mistake again, then he is on the right path. Guide him if you can, otherwise, don't give him advice that won't work for him.
He might be a better trader than you, so let him learn. Give him some resources if you have any.