The reduction in electricity consumption to maintain the network means that the difficulty of processing a block of transactions will decrease.
Theoretically, this means that it would be easier to attack the blockchain network and create 51% of attacks.
What do you think?
I would use the word 'comparatively easier' instead 'easier'. Creating 51% attack still gonna cost lots of computing power. On top of that, it will be wholly loss-loss situation for the party so I don't understand why would someone do that. Better use such resources for the mining of bitcoin to make nework stronger.
Yeah its true that bitcoin halving is going to increase pressure on miners and managing overall mining costs is definitely a big issue here. After halving if bitcoin keep holding its price towards uptrend than it will be a little relief for miners. Most important fact is miners have to cover their costs anyhow otherwise a big number of miners will shut down their rigs for sure. So during halving only bitcoin price can help them to tackle the upcoming situation.
I don’t believe that miners will take hard decision to shut down their businesses for ever but most of them will try their best to survive in a situation like this.
It's simple math that in order to keep all current miners profitable, Bitcoin price needs to increase by two-folds. I don't see that happening any time soon. So miners will leave, no brainer in that. However, number of miners and hash rate are dynamic. These keep moving up and down with the bitcoin price. Even though few miners leave after halving, there's high possibility that they start machines again when bitcoin price booms.