Does your father think it is an anarchist scam to throw governments out of power? Maybe you can tell him BTC is in fact an asset class for storing value (Don't tell him about BCH).
He still believes Bitcoin (and crypto in general) is a money laundering speculation tool. He doesn't respond to logic on this...
Well, he might be experience a thing called "statism". It's a religion like condition that believes ANY-thing that goes against the state is a moral issue. It's tough to cure.