Hello!

With the recent decrease in value of Bitcoin, the value of almost all the altcoins dropped too.
Now BTC is rising again and so are the altcoins.

I am thinking that if Bitcoin ever crashes, I mean completely drops to a very low value and when doesn't increase anymore.
Then the altcoins are going to drop too and won't have a high value anymore too, which means the cryptocurrency world will die.

Is my statement just nonsense or can it be correct?

I'm curious of what you all think will happen to the altcoins if BTC crashes for real.