I think bitcoin could well reach $2,000 - $3,000 if this $6,000 support get's broken. If you would sell now chances are high you could buy back and thus double your btc holding.
This is not financial advice, just a thought.
And this is not a good year for crypto I believe. Late 2019 we'll see some action.
It's difficult to predict the market and if you sell it now, there is no guarantee that the price will continue going down and making a back-back will turn you into FOMO if the price will rise after you sell your coin. A better strategy is to hold and be patient to wait the bounce back to gain a good profits without risking your funds.