If you are a large majority holder, selling off to a known exploiter is a very risky move. You might be able to realize great profits of the price increases. But you don't know how much the attacker has gathered from other sources. I think realistically it can happen, but a takeover attempt from buying a large stake should be plainly obvious. The community could even organize price fixing (i.e. "hold", which we've seen on WSB) to fend off the attack. You can even pull off something like forking the chain to invalidate the funds of the attacker -- it would be pretty obvious which stakeholders are responsible for the attack. For a chain where those coins are tainted or deleted from the chain.
Those avenues are not really available for PoW chains... if an attacker gets the necessary hardware, there's not much you can do. You can try changing protocol, changing algorithms, etc. but this has obvious consequences of its own (making all mining hardware so far near worthless)... it's a bit scary to be honest.
Those avenues are not really available for PoW chains... if an attacker gets the necessary hardware, there's not much you can do. You can try changing protocol, changing algorithms, etc. but this has obvious consequences of its own (making all mining hardware so far near worthless)... it's a bit scary to be honest.