It can but you must be savvy otherwise it could lead to total ruin. If you can accumulate more, then great; if not, if may just be best to stay still if you're already in a good position as to not look a gift horse in the mouth.
I agree with you on this because with any wrong trading step this can lead to total loss, as I have witnessed a similar situation sometimes ago. I bought at a price that suddenly dropped deeper and I end up losing massively but thank goodness I recovered from that.