Possibly it can happen because Bitcoin nowadays plays as the most trusted and preferable crypto by many people that is why there are many people who go beyond it. If Bitcoin die, maybe they will somehow loose their interest beyond crypto but partly as time goes on, for sure many people will seek altcoins to replace Bitcoin based on their own perspective and I am pretty sure that many people will go beyond Ethereum since they are always doing comparison between it and Bitcoin. Also, for sure there will be a lot cryptos to be launched and established that will offer a lot more benefits compared to Bitcoin if ever it will die.