What happens if the BTC price doesnt rise and it is not proffitable for miners to mine? They will quit and the BTC network gets insecure?
the miner will move to altcoin and bitcoin network will slower and slower so many unconfirmed transaction will make a queue and bottleneck will happen
miner is the most important thing in blockchain system
the miners will love bitcoin more, they will not leave bitcoin as the price of bitcoin will double up and the half reward will not affect the miners as they will get a doubled value bitcoins.
Are you dumb?
The price doesn't double instantly as soon as the reward halves. In fact, it won't double at all for a while after that unless other external and unrelated factors affect it. All that will happen is that the reward halves and maybe in a while we'll see a slow increase.
Besides, we've already felt the effects of the event upon us. Leading up to the halving, there's hype that causes buy orders.