What would happen if all these large mining farms just up and quit business? They have allow of money in bitcoin and all, but what if one of them decided to try to pump the price and then just stopped mining, or just stopped mining for some reason. Is there enough power throughout the rest of the world to keep bitcoin running and confirming?
Its no big deal if big miners stopped then small miners will do the mining. But if there will be a mining blackout then its still okay but we will need to return to the older bitcoin process without mining. There will be unsafe transactions, transfer of bitcoin from one wallet to another may be easily traced and hacked. So it is better that mining exist though it may not affect bitcoins existence but it will affect the mindset of people using bitcoins.
For sure it will not affect the existance of bitcoin but it may cause so many problems in terms slow and unsafe transactions. Whatever be the case, the possibility for the mining will get stopped is very then because people make money through mining so how do expect them to stop doing what is profitable to them.