Here's who we can think of, but surely creative people will surprise us.
Thanks to the Conditioned Proof Of Capacity (CPoC) consensus algorithm , Diskcoin is hundreds of times more energy efficient than most cryptocurrencies.
Diskcoin uses Conditioned Proof Of Capacity (CPoC) consensus algorithm，so Diskcoin is mined with low power hard drives instead of energy hungry CPUs, GPUs and ASICs. And Hard drives are cheap and easily accessible. Miners could use free space on their hard drives to mine Diskcoin.
Miners need Staking the corresponding Diskcoins to get the most benefit. And the proportion of coins that need Staking is not simply fixed or decrease progressively. Instead, an algorithm named DES( the Dynamic Equilibrium Staking ) algorithm is used to adjust the staking percentage according to the difficulty of mining.