Selling Quarks at these days is very unwise.
People should be holding this coin it will grow in value at least 10 times soon.
Now it might be time to buy more when price is so low.
All solid cryptocoins with honest and active developers will go skyhigh because high price of bitcoin will increase also price of other coins.
Today people were dumping altcoins because bitcoin grew only a few $$.
but in long term this low price of altcoins attract money that are flowing around and all these money will want to buy quarkcoin, ADT, pennies, securecoin, iFC, LTC and all usefull coins.
There are tens of billion of USD printed each day out of nothing and if just a fraction of these money would go into cryptocoins everything will grow 10 times in just one day.
I put all my money into altcoins. I am sure some of them will grow even more than bitcoin (of course they will not be $200 but when quarkcoin grow from almost zero it could be 1000% earning)