Miners use tons of electricity to process transactions, and the general assumption is that miners directly sell their newly created bitcoins to cover their costs. Almost everyone knows that after the halving, not 1800 bitcoins, but only 900 bitcoins are supplied to the market daily.
This change is believed to have a positive effect on the price of bitcoin.
If the price of bitcoin does not increase after the block is rewarded by half, the miners revenue calculated in $ will decrease. This means that they will have trouble covering their costs, and that will cause miners with the highest electricity costs to leave the market first. 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?