Good thing you experienced that on the way. Why? Because that bad experienced will be your foundation for much better trading experience that will affect your future decision. Not an assurance that you will always win next time but you can minimized the risks.

Now heading back to your question about what's the best thing to do, it's in your hands to make an own decision.

Study the case, refer to others who also have that coin, be updated in their main platform discussions (ANN, telegram, social media etc.), feed your mind and that's it. Your own portfolio can only managed by you so take this as a challenge.