What I usually do if prices are falling most specially if the coins are very low, I would buy more coins from a much lower price and your total amount of couns would then be divided; the result would be lesser losses. Read or research on google about books or ebooks on trading.
Same thing. I mean you should stay firm and be able to think of decisions or tactics to gain more. I mean think of it as an opportunity to be able to buy , hoard or invest more in much lower price. In that way you could earn more and will continue to do so.