Bitcoin is a very popular crypto coin today, we know that Bitcoin will be very expensive in the future but I imagine if Bitcoin die, whether there will be hope for the future of altcoin? because most altcoin exchanges are to bitcoins
your opinion is highly appreciated.

recent years markets show that some alt coins try to be independent for example ETH, so i think after 2020 we can not see any relation between BTC and other altcoins. technology of some alt coins is very good and we expect to see this in future that ALTs will independent.