What's happening to Bitcoin right now is just normal, it rises and fall. I have four things on my mind. If you need the money at the moment, then sell it otherwise hold it. If you don't want to hold your bitcoin anymore, then sell it otherwise hold it. If you think the bitcoin you have earned is enough for you, then sell it otherwise hold it. But if you would like to hold it for long-term and have the patience to wait, hold it. Holding for a long-term surely gives you a big profit. The price is not in its maximum yet and it will still grow in the coming years so better hold your bitcoins, especially if you still don't need it. Anyway, the decision is yours.