What if somebody will make a huge dump and sell it all the way to earn some profits because of this rally in bitcoin,and someone sees it and do that same thing. Is there any effect on bitcoin when someone to this,?
It would depend if those "somebody" holds a lot of Bitcoins. Just remember what the Bitfinex hack has caused us. We were slowly increasing and then it stopped and dropped really hard. Right now, we're still recovering from that. In fact, we were right in the middle of the correction after hitting sub-$800 highs earlier in June before the halving. The Bitfinex hack happened on August 2, when the price had already been plunging down since July 30. I would hardly call that leg down as "slowly increasing". In any case, the price is now where it had been just before the hack...
And we are essentially back to square one