[rb12345]

The problem here is that the latent firepower can be used in two ways: to help defend the blockchain, or to destroy it. With 62% of hashrate offline, it's entirely possible to buy up the old miners cheaply, wait for complexity to fall, and then use your newly acquired hardware for fun and profit. Bear in mind that the attacks here could be 51% transaction-invalidation, or simply just messing with the complexity (jumping from 25 minutes/block to 3 minutes/block and back again as the system corrects for the changes in hashrate).