if you are getting scared you should not be in crypto, the market will always have huge swings in the coming years, this is completely normal and healthy for the market. I am even prepared to wait out a 2018 bear market, even though i think that is unlikely to happen
Control your mind before it starts controlling you. When someone have invested in bitcoins it is a natural way to react when prices are not going up. But that isnt the solution. You need to be calm and cool when things are not going in your favor.
Real trader comes out when disturbance is revolving around you. You need to be relaxed and see how you can manage it so that loss cant be your fate.