When there is no bitcoin, then there is no market anymore, at present the entire market is calculated based on the growth attained by bitcoin. Second thing the growth of altcoins were also calibrated with bitcoin as the reference point, when there is no more possibility there might be some other way, else it could get ethereum as the reference asset.
well, in my opinion, I don't think that there's a market if there's no bitcoin in this industry. we know that this industry is create to make something about the cryptocurrency and we know that the bitcoin is the first of all coins. maybe the bitcoin have a highest valiable so that they create other coin and make a market to determine each price and value.