Hey,
I swapped around 80 ethereums, for 3000 ETC, Right now the 3000 ETC worth 119 Ethereums.
Should I take the 39 ETH profit, or should I wait till ETC will be on Coinbase?
An intelligent exchange. You have generated almost 50% profit. It is best to sell it before listing in the coinbase. Because prices are usually FOMO before being listed. And after the ETC was listed at the coinbase I thought its price would go down gradually