A loved one requests input on BTC ETF:

Let say you had a relative who had been against Bitcoin for all of these years and is finally coming around and has expresses interest in getting into a bitcoin ETF. There is nothing you can say to convince them to hold their own keys, you can’t stop them from putting the money into the ETF, you care about this person.

Which ETF do you suggest they move into? Or do you advise them to spread it amongst more than one to minimize risk of a single counterparty?