ETFs are worthless junk.
You need to spend about 15 minutes to know how to stay safe.
15 minutes if you read, 15 hours if you watch retarded YouTube videos explaining it.
/Over&Out.
It's simply as Not your keys, not your coins. Shares from Bitcoin Spot ETFs are unsafe, because investors don't have any private key and they totally depend on Bitcoin Spot ETFs and their custodians for securing private keys. It's double risk as most Bitcoin Spot ETFs are not self-custodians but use other third party companies with a role of custodians.
Spot Bitcoin ETFs: Everything You Need to Know. It does not say everything but you can get something by reading this
More broadly, spot Bitcoin ETFs can help create additional opportunities for institutional and retail investors to speculate on Bitcoin without the technical challenges of managing a cryptocurrency wallet or the security concerns of safeguarding private keys.
They write it not to tell people about risk but if you understand the saying "Not your keys, not your coins", you will smell big risk there.