First of all, I feel bad for what happened to your family. It's not bitcoin's fault actually but I understand why are you blaming it to bitcoin. It's not bitcoin who told your brother, "hey try me" or whatsoever. If you want to blame someone, it's your brother, for doing it knowing that you need that money. And that someone who influenced him and introduced him to gambling that makes him addicted.
If people lose their assets because of bitcoin, it's one of the risks of a trade, because many are bankrupt in trading even though it's not bitcoin. The point is our own ignorance which causes loss of money because it follows bitcoin trading.
So, in order not to fail in the trading it is better to first study in depth and analyze information from various media to understand what bitcoin is and how to succeed in bitcoin trading. Without learning, I think many people will fail.