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 tell you what, sell all your bitcoins to me for $3500. If you think its going to $2000 then this is too good an opportunity for you to miss out on.