Mathematical fact: you cannot deploy external capital to defend a system that is secured by internal history (stake). This is why stake based BFT does *not* secure against attack by a state or central bank, which means *anything* secured by PoS MUST comply with governments.

You cannot out-stake a bad actor who has aquired sufficient stake to fuck with the system, your only option is to fork them out. Then it becomes a competition between charismatic personalities convincing the market to follow their authority (their fork) instead of the other guy.