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.
I think the bitcoin value will not be that cheap, its value will be higher than now though not too high. so to double the bitcoin we have to buy, and have to be a little bit patient to hold it. selling it now will only decrease the value of bitcoin.