And?
Do those paper bitcoin pushers (providers) have any of the bitcoin to back up those claims on bitcoin? In other words, do they have as many bitcoin as they claim to have? We know that entities like that do not shoot straight, and they will take every opportunity to shave off extra profits when they can get away with it, and also to control and manipulate the market as much as they are able to accomplish. Perhaps contrarian goals, yet certain insiders are able to get away with fleecing aspects of the public when they are supposedly "providing a needed service."
Without publicly and easily auditable balances, I do not believe that ETFs hold all the coins that they claim to hold. Without this they are easily able to hide that they have plenty of paper coins. This is why institutions tend to refuse to do this or avoid the topic, it has nothing to do with security or whatever else they say.. a signed message or other proof or reserves methods once per month would go a long way.