Earlier quoted context omitted.
I believe the fee = the ETF holds bitcoin securely for you instead of you having to deal with wallets.
Yes, how does the ETF hold and secure the coins is what I'm asking.
Now they do have to design redundancies for the keys. eg. they should not lose access to the assets because say they made it too safe and cant find the keys anymore :p
It's funny because it happened with Prime Trust a crypto custodian. But I'm sure a company like BlackRock can and will do better.