to me the only reason is that most and most people are entering in the world of bitcoin that really making bitcoin more and more stronger and so the price is also becoming more stable.
Nah, that's not it. People are expecting the price to go up significantly from the moment the block halving took place. Long story short, they are still waiting for something that might not even come, at least, not block halving related. So yes, the waiting will continue...
I personally think that the value we're sitting at is basically what we would be at otherwise, with a rise happening immediately after the halving or a slow increase upwards and the pricing in of the halving beforehand. What we saw was the increase of value from $300 in summer 2015, something that was what I estimate the bottom-line for a lot of miners, to ~$600 after the halving. Based on that and the difference in supply, what we see in the market is expected.