If the ETH price drops 60% from here, mining will not be profitable for most people. That is risky.
It will be only in case if eth drop with
all other coins.
From a miner point of view eth dropping 60% would have about the same effect as eth going 50% pos. Yep, not possible but you get the idea.
Half of the current eth nethash looking for a new home, what could it possibly be? xmr, etc and zec. Everyone knows what that would mean.
I think that is the reason why the difficulty of ZEC or XMR is so high.