Yeah I know people like that. Mixed succes with highlighting the following points.

The main reasons for avoiding ETFs or leaving your bitcoin with an exchange provider are:

- You have no control over your bitcoin; they decide what you are allowed to do with it.

- If something goes wrong at the company, you could lose your bitcoin, as it’s not covered by any bank guarantees.

- Changing regulations could negatively impact you.

- You’re suppressing bitcoin’s fiat (dollar) price because these companies often don’t actually hold the amount of bitcoin they claim to, similar to traditional banks.

It’s a common theme. Maybe meet him /her in the middle with collaborative custody?