i think profitable or not depends on the exchange where the new coin is listed, i guess as soon as the new coin is listed on top exchanges, like Binance or Bithump, it price will increase very fast at the begining, may be x5, or x6 very soon, but this will be the chance for us to sell because most of new coins listed on exchanges will be dumped badly at the begining, so i suggest you should sell as soon as possible for profit.