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.

btc is a major crypto in the crypto currency system but it is difficult to say this, because now besides btc there are many other crypto that also attract btc investment, such as ETH, BitcoinCash, etc.