That's why there's always the option of managing other people's funds. That way, you're no longer risking your own money, but someone else's investments. For a steady income, you could also launch a subscription-based copy trading service or build a referral network.
For me, these are mutually exclusive things and it is not clear how the ability to trade and at the same time the complete lack of money for trading can be combined. Maybe things are different, he just thinks he knows how to trade, but in fact he's just a loser who lost a deposit.