Yes, it seems that global market begin to decline and bitfinex no longer become the one which has highest exchange rate, start to normal I think but coinbase has higher price of bitcoin right now. Sell now and then the price will increase again, lol. But, before it going so far (decline) better to sell a bit but not so much, based on your calculations. For me, I won't sell any, I've done that before and regret it until today, so no more.