I always told my brother that the government is stealing his savings with the printer. Also pointed out that banks don't keep reserves and loan out his money to give themselves interest..... At risk, and he gets none of that. I compared that to Bitcoin, and he would admit that it sounds better.

I never quite orange pilled him, but he did recognized the value of DCAing a dollar a day as a hedge and has been doing that. He might listen more once he actually has money to lose, he is still in school. Its helps that he leans libertarian/right, gave me a rhetorical beachhead. If you don't have that ideological overlap with your brother then it would be even harder.