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.
I'm sorry, but can you explain?? As far as i know, there is no older bitcoin process without mining ... Mining is the act of verifying, calculating and putting transactions into the very blocks that create the decentralised ledger that is bitcoin. It's more complex than this, but this is what it comes down to. There would be no bitcoin without mining, unless i'm mistaking here... The network would still exist, but the decentralised ledger would remain completely static, no confirmations, just transactions in the mempool using unconfirmed inputs to create transactions...
Same question/tought here... What's older bitcoin process? unsafe transactions? Wtf...
And I doubt any bigger miner will stop to mine for longer times, time is money here, blackout or other thing, they will find a way to back to mine asap...