Increasing Mining Dufficulty
https://bitcoinwisdom.com/bitcoin/difficulty
This means more hashing needed to mine the same amount if Bitcoin prices don't change. With increasing price miners are drawn in again, making the ongoing spiral just go nuts.
When price drops miners will panic sell once again.
Gridcoin is the one solution to mindless mining. Crunching scientific and health related projects that benefits the humanity should be clear for anyone to do. Join the revolution! 😎