1. You should not be afraid and sell your bitcoins.
2. You should buy more bitcoins when their prices hit the bottom.
3. You have to persist and store your bitcoin for long.
This are the right thing to do when prices drop instead of being panic of every fall. Watching the chart all day make you sad but take a look on the bright side of it. Buy huge volume at lower price makes you lessen the risk because once the price recover you are going to gain good profit even it takes longer time.