Oh God .. is this really what my eyes see ?? .. so what is the problem ?? That if you sell and keep 300 waiting for it to reach some point to buy and if that point doesn't come?

I don't see what the problem is with selling in red. If, for example, you had 500 dollars, and now you have 300 dollars because of the drop, then sell it, and wait for it to go down more to buy again with those same 300 dollars, or is there any difference in doing this or letting it go down and then up? I think it's better to sell it, wait for it to go down more, and buy with that same money.