The computing power required for centralised mining means that the whole market has become centralised, typically in countries with low or subsidised power available.
This is contrary to the concepts of a decentralised system.
Only those with lots of money can afford to join in the game.
However each of us has computing power available, that we may not be using at a particular point in time, and together we have far more processing power than any centralised miner.
Finally a solution appears, and the good news is the user can setup how the funds earned are distributed.
Perhaps we are on the way to humanitarian aid via blockchain mining, rather than the rich getting richer by locking the rest of out.