When it comes to Bitcoin halving, you should know that everyone needs to fight for themselves. This is basically an opportunity for whales to make massive dump, knowing fully well that most attentions is diverted to the halving event. So I would advise that you monitor your crypto project strongly and stay alert so as not to incur losses, especially if you are a short-term trader.
As for miners, their rewards would be halved as it has been designed in the protocol. Mining process would become more difficult and would require collective efforts to get the job done and earn a reward. Some solo miners might consider joining a mining pool due to expenses that might arise.
I think the effect of halving is quite contradictory, with everyone having their own way of explaining it. From history, we've always experienced an increase in the price of most coins in the market after some months of the halving event. Bitcoin's price hike during this period has been tied to demand factors, with most people believing that an increase in demand usually leads to an increase in price. Others also believe that demand literally has no effect on the bull market, but rather it occurs as a result of rumors and information that have been in place for long.
Whichever category you happen to fall into or believe, just note that there should be a bull market months after the halving, but this coming cycle might be an exception due to the approval of the spot Bitcoin ETFs. As of now, the market is not predictable, rendering history useless. But let's keep our ears to the ground and stay alert so as not to miss out.