I observed that bitcoin price rose to $4,950.72 on september 1 and since then it has been dropping. As i want to investing in buying bitcoin, i need to know whether the price will still go up or it has started moving down.
There is no way of knowing... Everybody will give you his/her personal opinion, but nobody will know for sure. Only time will tell.
I personally think (hope) BTC will recover and see +$5k in the near future, but i won't invest extra fiat into btc right now...