We can't predict exactly what would be the effect of halving on bitcoin price , but personally i think the price will increase highly after this halving, especially we noticed the price rise a lot the few previous weeks.
Yeah, we have already risen a lot over the past few weeks but it would be impossible to tell what would happen next. Who knows, bitcoin might break the all time high after halving as far as anyone knows.
Time will tell though that bitcoin will be the dominant currency of the world.