I thought the reason you asked about moving ETN to Cryptopia / exchange was because of the fact that you wanted to sell your ETN , so YES you can sell your Electroneum and buy BTC by going to Cryptopia BTC Pair and while you are in ETN/BTC pair , just sell your ETNs and you will get BTC.
But is it of any worth ? well just to have 20USD worth of BTC you will need to sell around 600 ETNs so its better for now to hold on to your ETN so if the price escalates you can make something out of it , as currently BTC is on its all time highs and the transaction fee is insane.