It was correctly mentioned that most means 51% and over.
Well yeah, some miners are shutting down their miners because currently even with free electricity mining isn't profitable. It happens because not everyone is able to handle loss, again big miners try to keep market. Don't blame me but still I think this price fall has to do something with mining, small players are going out of market and for example bitmain will have new and great antminers, they'll try to fill 1-2% loss and mine with better equipment and less difficulty. After that, price will rise.