there is greed building inside me little by little...i don't know why...

It probably has something to do with the fact you subscribe to the Warren Buffet Be fearful when others are greedy and greedy when others are fearful philosophy.
Also similar to Baron Rothschild's "the time to buy is when there's blood in the streets" mentality. Both men are famous for making their fortunes in the stock market, so probably good advice to follow.
Myself, I think the fear and blood levels are still a bit lower, but even if you are beginning to accumulate some coins now I don't think you will need to wait too long for at a minimum a relief rally.