That's mean alternatively, if btc falls flat altcoin will dies off. What their deep relationship? Why btc important to altcoin, what's the connection in between? Will altcoins really survive without btc?
The way I see it, altcoins dying off without bitcoin is a reasonable assumption. This is because Bitcoin is the harbinger of the cryptocurrency era. When people talk about crypto currencies the first thing that comes to the minds of the majority is Bitcoin. Not to mention the fact that most of the whales in this industry are invested more on bitcoin rather than other coins/altcoins. But this fact also makes the thought of Bitcoin dying out quite an impossible assumption. Although if it does happen in the future, despite suffering for quite some time, I believe that another coin will replace bitcoin. Why? Because people have already had a taste of this industry and will surely long for it one way or another due to the profits and utilities that we, or the future crypto enthusiasts have already gotten accustomed to.