Can someone tell me some predictions about the price after Bitcoin halving?
I don't think it matters much. I guess you know this, just to make it clear: Bitcoin is not halved, only the block reward. Some miners might go out of business, because the costs for mining are higher than the rewards, which will reduce mining difficulty, so the remaining miners can mine cheaper, until block reward and mining costs are the same again. But Bitcoin price might go a bit up, because there are less new Bitcoins per day. The current Bitcoin price increase might have anticipated that already, so not much change in the future.