If it falls to double digit it will probably drop upto 50-80$ but i think everyone will be buying tons of it so , that time will be small probably 1-5mins or such
Yes that time will be the best time to buy as much as possible but I do not think that the price of ethereum will drop to double digit. If someone bought from now then it is possible that he will be at a great success in the future in financial conditions.
I believe this is the time where it at bottom and do not expect further falls from here to start buying and get them accumulated as much as possible before the rise starts and then it becomes too expensive for us to buy at those rates . This at present is the best idea.