I got into the debate of same subject very recently over Reddit community, where someone suggested buying ETF is same as buying bitcoin but it's Big NO.

Bitcoin is bitcoin, everything else which can claim they are backed by bitcoin but we can't verify them we just need to trust them for storing our money in their custody which is not Satoshi visioned. Bitcoin should be move in the direction of self custody, be your own bank not the same rigged game of trusting someone with our money. Anyway it's just my opinion.