Imagine in 2 years, Coinbase gets hacked

They hold all the ETF coins

Investors lose 100B+ worth of BTC

No problem, just fork and reverse the txn, just like eTheReUm did and what eth classic is

And while you're at it, build some functionality for special cases to reverse other txns, like North Koreas and Hamas.

And btw, if you're an American public mining company, you are only allowed to mine this new fork.