There are no buy orders on any exchange at all. Which means you can't sell them.
ok, but that doesnt mean its gona be like that forever.
OP, if ure searching for profits in mining, try checking out https://www.altcoincalendar.info/calendar
there u have a list of coins that are launching, try to find a coin with some/big support, most of the time mining those coins and holding coins until the pow phase ends turns out biggest profits.
also, if coin has no POS phase , u may want to mine it like a week after the launch, coz many miners tend to mine all coins in start "just in case"
hope that helps you a bit
cheers