Bitcoin will be fine even if some miners decide to leave. Hell, if half of them leave, they will share the same profits that they have now before the halving, because
there would be also half of parties to share with. Why do u think they would leave ? What would they do with all the equipement ? They wont just toss it away..
Please check Mining forum on bitcointalk.org
https://bitcointalksearch.org/topic/shutting-my-mine-down-today-1365657some miner posted that he decided to turn off his mining machine and decided to sell it.
This is just the beginning,,, think about after the halving,, it will be a chaos,,
confirmation could take a day,, ,,, miners leave + block size debate + malicious transactions ,,,
it will cause total chaos....
"some miner posted that he decided to turn off his mining machine and decided to sell it." - That means there will be one miner less (the seller), and one miner more (the buyer)
So where is that loss of hashrate you are referring to. And keep in mind that you are talking about some miner only claiming that he will sell..
"Confirmation could take a day" - In case of hashrate drop, mining difficulty will recalculate and confirmation speed will be the same it is now.
"it will cause total chaos.... " - There's more chaos in threads like this one spreading FUD, than there is real issues.