If he's scared to loss money then he probably isn't ready to gamble. Losses is what gambling is all about. If you can't accept the idea of losing then you shouldn't expect to make any wins. I guess this is where many scammers are able to pull a plug on new gamblers, claiming that they have a sure way or game strategy that would yield wins over time. If we don't want to take the risk, then stay away from gambling, so you don't end up regretting.
You're right. It is just strange if gamblers feel scared to lose money in gambling. It means they don't understand gambling well. The gamblers who know well gambling, they must be ready to lose money. The chance to win in gambling isn't as high as in trading or investment. We mostly rely on the luck in gambling, this is something very difficult to determine. If someone wants to get a higher chance to earn money, he is better to learn investment or trading in crypto.