If I were you jsut hold it and just ignore the price if you see it falling down. Holding is the only good choice that you can do if you really want to earn huge amount of money. Until now I didn't sell my bitcoin and most of them are in my ledger wallet which i keep in my safe place. You are the only one who know when is the right time to sell it so just be patient and just watch the price of bitcoin growing up in the year 2020.