At mempool.space , we can find that these days, the network hashrate increased, the next difficulty is predicted to increase about 10%. After halving, what is the motivation to let more and more power to come into mining BTC?
The motivation? To make money.
More efficient gear will get you more hashrate for the same power costs while also driving up the difficulty.
That is how the system works.
Some miners with older gear that is less efficient or miners with more expensive power will drop off. Will others take their place is the question. And that will not be known for a while.
Also, there are people with deep pockets who are speculating. Loosing some money today thinking that
BTC will 2x in price will also keep people mining or bing in new miners.
-Dave