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 is difficult to say that your thoughts are right or wrong because everything is possible. If it's down to $2,000- $3,000 it's too late, but I think that's unlikely. A good future awaits us ahead.