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.
You are mistaken it is too late too sell, the price is not going to go that much lower and all of those that think otherwise are simply mistaken, if you wanted to sell you should have sold when the bubble was just bursting, personally I did not sold my coins because I hate risks and I do not have a problem holding my bitcoin even at the current prices.
Yes I am also agree with you that it is too late to sell, I think that the best time was when bitcoin price was trading in its peak at 20k level, but now the price is trading too low and therefore we should wait for good time to come , when bitcoin price will again start trading above 20k.