When the prices are falling and you already bought those tokens all you need to do is to wait patiently for its value to rise again.There's no need for you to do rush selling if your goals is to earn big because in trading its really takes time its because the value of tokens are volatile so all you need to do is to wait patiently.
Right! Coin can sink,and two months can make X10. So don't panic and keep the coin! But you need to consider the statistics of the coins!