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.

Falling Bitcoin is a sign for all of us that the market is going down. This is a rule. I don't believe in Bitcoin death. On the contrary Bitcoin will be first cryptocurrency with a stable price. That's very important.