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.

Yes it is, if bitcoin dies, altcoins will die also. Why? Bitcoin is the king of crypto, bitcoin is so popular also, bitcoin is the crypto with high price now. Logically, i think when bitcoin falls, altcoins will fall also.
Bitcoin will not die, bitcoin has it's own future. So altcoins will not die anymore.
