Part 10/17:
An "invisible capture" issue arises where a small, wealthy subset could control more than half of the staking power, leading to network manipulation—the "51% attack in PoS.
The Long-Range Attack and Weak Subjectivity
Ethereum's "weak subjectivity" implies that trust is required to decide which chain is canonical after long offline periods or network splits. This trust could be misplaced if the chain is manipulated, raising security concerns.