as long it'll make bitcoin price's rise, i can sure all people who hold bitcoin will be happy but for the miners, i feel so sorry, their profit will going to be cutted half until some price rising,they need atleast a double price of bitcoin
Their profit will not be cut in half. Their gross earnings will. Their profit could well go into the negatives if their mining is just slightly profitable at this current stage. That's why many miners would simply stop once the halving comes. It would be inefficient to mine unless you had some huge mine or a next-level ASIC.
Obviously, they would shy away if the difficulty is still as high as it is now, but if it lessens to the point where there's still profit, some miners will stay. The overall number of miners will decrease, however.