If you already broke that rule and you put in more than you are comfortable losing, then you have to go in to recovery mode.
your goal should be to find ways to at least make back what you initially put in to it.
This might sound counter intuitive, but you should be buying up more coins now.
Since you bought in last december, prices where at all time highs.
To make back that amount would be very difficult.
So you buy more of the coin at a lower price right now, this will decrease your overall cost per coin.
Then, it will be much easier to sell them off when a pump comes along.
If you want out, then run the numbers and sell off to make back.